diff --git a/xml/ns-Microsoft.Extensions.AI.Evaluation.Quality.xml b/xml/ns-Microsoft.Extensions.AI.Evaluation.Quality.xml
index 7fc1e885a2a..28eeed78296 100644
--- a/xml/ns-Microsoft.Extensions.AI.Evaluation.Quality.xml
+++ b/xml/ns-Microsoft.Extensions.AI.Evaluation.Quality.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.AI.Evaluation.Quality">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains evaluator classes that assess the quality of large language model (LLM) responses in an app according to various metrics.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Html.xml b/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Html.xml
index 4da6ce69504..09dffd30554 100644
--- a/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Html.xml
+++ b/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Html.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Html">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for generating HTML reports that contain evaluation metrics for AI models.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Json.xml b/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Json.xml
index 5e2df520c67..d6e27511c43 100644
--- a/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Json.xml
+++ b/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Json.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.AI.Evaluation.Reporting.Formats.Json">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for generating JSON reports that contain evaluation metrics for AI models.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Storage.xml b/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Storage.xml
index f542f948790..eb24bb31ce7 100644
--- a/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Storage.xml
+++ b/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.Storage.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.AI.Evaluation.Reporting.Storage">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for storing the results of large language model (LLM) evaluations and for caching LLM responses produced during such evaluations.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.xml b/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.xml
index b6cab8cf24f..583a27cb0d9 100644
--- a/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.xml
+++ b/xml/ns-Microsoft.Extensions.AI.Evaluation.Reporting.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.AI.Evaluation.Reporting">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for generating reports based on AI evaluation metrics and for caching AI model responses.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.AI.Evaluation.xml b/xml/ns-Microsoft.Extensions.AI.Evaluation.xml
index ab4d1dec6e0..ec7275604c7 100644
--- a/xml/ns-Microsoft.Extensions.AI.Evaluation.xml
+++ b/xml/ns-Microsoft.Extensions.AI.Evaluation.xml
@@ -1,6 +1,8 @@
 <Namespace Name="Microsoft.Extensions.AI.Evaluation">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>
+Contains types and abstractions for evaluating AI-generated responses, including metrics, evaluators, and extensions for interpreting and processing evaluation results.
+</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.AI.xml b/xml/ns-Microsoft.Extensions.AI.xml
index fd90fb9bd94..e210eb6e93a 100644
--- a/xml/ns-Microsoft.Extensions.AI.xml
+++ b/xml/ns-Microsoft.Extensions.AI.xml
@@ -1,6 +1,9 @@
 <Namespace Name="Microsoft.Extensions.AI">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>
+      Contains types for building and managing AI-related functionality, including chat clients, embedding generators,
+      tools, and utilities for working with AI services.
+</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.AmbientMetadata.xml b/xml/ns-Microsoft.Extensions.AmbientMetadata.xml
index 494523a46dc..906cb9ec686 100644
--- a/xml/ns-Microsoft.Extensions.AmbientMetadata.xml
+++ b/xml/ns-Microsoft.Extensions.AmbientMetadata.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.AmbientMetadata">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that represents an application-level metadata model.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.AsyncState.xml b/xml/ns-Microsoft.Extensions.AsyncState.xml
index 14affcfdb07..fd9e5df2017 100644
--- a/xml/ns-Microsoft.Extensions.AsyncState.xml
+++ b/xml/ns-Microsoft.Extensions.AsyncState.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.AsyncState">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that represents a registered context within the asynchronous state.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Caching.Distributed.xml b/xml/ns-Microsoft.Extensions.Caching.Distributed.xml
index c80810ac1c1..c1c67d2bbd3 100644
--- a/xml/ns-Microsoft.Extensions.Caching.Distributed.xml
+++ b/xml/ns-Microsoft.Extensions.Caching.Distributed.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Caching.Distributed">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for distributed caching, including interfaces and implementations for caching serialized values.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Caching.Hybrid.xml b/xml/ns-Microsoft.Extensions.Caching.Hybrid.xml
index 71090afec4e..a482089b161 100644
--- a/xml/ns-Microsoft.Extensions.Caching.Hybrid.xml
+++ b/xml/ns-Microsoft.Extensions.Caching.Hybrid.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Caching.Hybrid">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for hybrid caching, combining in-memory and distributed caching strategies.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Caching.Memory.xml b/xml/ns-Microsoft.Extensions.Caching.Memory.xml
index 39510ca8675..79f91e9072d 100644
--- a/xml/ns-Microsoft.Extensions.Caching.Memory.xml
+++ b/xml/ns-Microsoft.Extensions.Caching.Memory.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Caching.Memory">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for in-memory caching, including interfaces and implementations for local caching.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Caching.SqlServer.xml b/xml/ns-Microsoft.Extensions.Caching.SqlServer.xml
index 6eb9b15d9a2..e23b59ee6e6 100644
--- a/xml/ns-Microsoft.Extensions.Caching.SqlServer.xml
+++ b/xml/ns-Microsoft.Extensions.Caching.SqlServer.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Caching.SqlServer">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for distributed caching using Microsoft SQL Server as the backend store.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Caching.StackExchangeRedis.xml b/xml/ns-Microsoft.Extensions.Caching.StackExchangeRedis.xml
index 8866be29c76..5c6699801bb 100644
--- a/xml/ns-Microsoft.Extensions.Caching.StackExchangeRedis.xml
+++ b/xml/ns-Microsoft.Extensions.Caching.StackExchangeRedis.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Caching.StackExchangeRedis">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for distributed caching using Redis as the backend store.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Compliance.Classification.xml b/xml/ns-Microsoft.Extensions.Compliance.Classification.xml
index 680002a0b23..bc94ed3c43f 100644
--- a/xml/ns-Microsoft.Extensions.Compliance.Classification.xml
+++ b/xml/ns-Microsoft.Extensions.Compliance.Classification.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Compliance.Classification">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for data classification, including attributes and utilities for classifying and managing data.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Compliance.Redaction.xml b/xml/ns-Microsoft.Extensions.Compliance.Redaction.xml
index d5946eb8933..191eab219c5 100644
--- a/xml/ns-Microsoft.Extensions.Compliance.Redaction.xml
+++ b/xml/ns-Microsoft.Extensions.Compliance.Redaction.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Compliance.Redaction">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for redacting sensitive data, including redactors and related utilities.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Compliance.Testing.xml b/xml/ns-Microsoft.Extensions.Compliance.Testing.xml
index aad9cd811de..5895341a92a 100644
--- a/xml/ns-Microsoft.Extensions.Compliance.Testing.xml
+++ b/xml/ns-Microsoft.Extensions.Compliance.Testing.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Compliance.Testing">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for testing compliance features, including fake redactors and data classifications.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Configuration.EnvironmentVariables.xml b/xml/ns-Microsoft.Extensions.Configuration.EnvironmentVariables.xml
index 90667821a9e..0faff2e7897 100644
--- a/xml/ns-Microsoft.Extensions.Configuration.EnvironmentVariables.xml
+++ b/xml/ns-Microsoft.Extensions.Configuration.EnvironmentVariables.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Configuration.EnvironmentVariables">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for providing configuration key-value pairs from environment variables.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Configuration.KeyPerFile.xml b/xml/ns-Microsoft.Extensions.Configuration.KeyPerFile.xml
index f3b4d8c93ad..8f66b94ea78 100644
--- a/xml/ns-Microsoft.Extensions.Configuration.KeyPerFile.xml
+++ b/xml/ns-Microsoft.Extensions.Configuration.KeyPerFile.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Configuration.KeyPerFile">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for using a directory's files as configuration key-value pairs.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.DependencyInjection.Extensions.xml b/xml/ns-Microsoft.Extensions.DependencyInjection.Extensions.xml
index fbe27b19ce1..6c160f3b05b 100644
--- a/xml/ns-Microsoft.Extensions.DependencyInjection.Extensions.xml
+++ b/xml/ns-Microsoft.Extensions.DependencyInjection.Extensions.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.DependencyInjection.Extensions">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains extension methods for adding and removing services in an <c>IServiceCollection</c>.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.DependencyInjection.Pools.xml b/xml/ns-Microsoft.Extensions.DependencyInjection.Pools.xml
index 9f4883fbeab..f01502689b0 100644
--- a/xml/ns-Microsoft.Extensions.DependencyInjection.Pools.xml
+++ b/xml/ns-Microsoft.Extensions.DependencyInjection.Pools.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.DependencyInjection.Pools">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and extension methods for configuring and managing object pools in the dependency injection container.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.DependencyModel.xml b/xml/ns-Microsoft.Extensions.DependencyModel.xml
index c643a06511c..4518cde78f1 100644
--- a/xml/ns-Microsoft.Extensions.DependencyModel.xml
+++ b/xml/ns-Microsoft.Extensions.DependencyModel.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.DependencyModel">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes, structs, and interfaces for managing application dependencies, including compile-time and run-time library dependencies.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.DiagnosticAdapter.Infrastructure.xml b/xml/ns-Microsoft.Extensions.DiagnosticAdapter.Infrastructure.xml
index 012f6fa14b6..0d41b9a9906 100644
--- a/xml/ns-Microsoft.Extensions.DiagnosticAdapter.Infrastructure.xml
+++ b/xml/ns-Microsoft.Extensions.DiagnosticAdapter.Infrastructure.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.DiagnosticAdapter.Infrastructure">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains interfaces for creating and managing proxy objects, including factories for run-time proxy creation and unwrappable proxy objects.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.Enrichment.xml b/xml/ns-Microsoft.Extensions.Diagnostics.Enrichment.xml
index cef087def8b..91931e76ac0 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.Enrichment.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.Enrichment.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.Enrichment">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and interfaces for enriching log records with additional properties, including options and constants for application and process enrichment.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.ExceptionSummarization.xml b/xml/ns-Microsoft.Extensions.Diagnostics.ExceptionSummarization.xml
index 6b2c2ada901..d62b7a83b56 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.ExceptionSummarization.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.ExceptionSummarization.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.ExceptionSummarization">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes, structs, and interfaces for summarizing exceptions for use in telemetry, including mechanisms to register and implement exception summary providers.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.HealthChecks.xml b/xml/ns-Microsoft.Extensions.Diagnostics.HealthChecks.xml
index 306091644c6..dc6c7cf61f2 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.HealthChecks.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.HealthChecks.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.HealthChecks">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and interfaces for configuring and managing health checks, including options for resource utilization, telemetry, and manual health status control.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.Latency.xml b/xml/ns-Microsoft.Extensions.Diagnostics.Latency.xml
index 7897d972fb9..89f900fe17a 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.Latency.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.Latency.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.Latency">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes, structs, and interfaces for measuring and exporting latency data, including options for latency contexts, checkpoints, measures, and tags.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.Configuration.xml b/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.Configuration.xml
index 2e0f3281516..2cb782785de 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.Configuration.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.Configuration.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.Metrics.Configuration">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains types for retrieving and managing metrics configuration for specific listener names.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.Testing.xml b/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.Testing.xml
index d3fdb848160..bd0f33a3ff6 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.Testing.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.Testing.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.Metrics.Testing">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for testing metrics, including tools for collecting and working with measurements from instruments.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.xml b/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.xml
index a665ade224b..5f507d221af 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.Metrics.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.Metrics">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes, interfaces, and enums for configuring, producing, and managing metrics, including support for strongly typed metrics, instrument rules, and listener configurations.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.Probes.xml b/xml/ns-Microsoft.Extensions.Diagnostics.Probes.xml
index bbc4784a913..f84b1223ea0 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.Probes.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.Probes.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.Probes">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for configuring and managing health-check probes, including options for Kubernetes and TCP-based probes, and standardized health-check tags.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.ResourceMonitoring.xml b/xml/ns-Microsoft.Extensions.Diagnostics.ResourceMonitoring.xml
index e685ce69604..ae41f66a5ef 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.ResourceMonitoring.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.ResourceMonitoring.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.ResourceMonitoring">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes, structs, and interfaces for monitoring system resources, including options for configuration, resource utilization snapshots, and publishers for resource data.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Diagnostics.Sampling.xml b/xml/ns-Microsoft.Extensions.Diagnostics.Sampling.xml
index f24a6f9d945..67807aa0411 100644
--- a/xml/ns-Microsoft.Extensions.Diagnostics.Sampling.xml
+++ b/xml/ns-Microsoft.Extensions.Diagnostics.Sampling.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Diagnostics.Sampling">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for configuring and managing log sampling, including options and rules for random probabilistic sampling.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.EnumStrings.xml b/xml/ns-Microsoft.Extensions.EnumStrings.xml
index 7654906073b..75fc5c9845c 100644
--- a/xml/ns-Microsoft.Extensions.EnumStrings.xml
+++ b/xml/ns-Microsoft.Extensions.EnumStrings.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.EnumStrings">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that provides information to guide the production of an extension method to efficiently convert an enum value into string form.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileProviders.Composite.xml b/xml/ns-Microsoft.Extensions.FileProviders.Composite.xml
index 7ce14c42804..d810c3d6c94 100644
--- a/xml/ns-Microsoft.Extensions.FileProviders.Composite.xml
+++ b/xml/ns-Microsoft.Extensions.FileProviders.Composite.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileProviders.Composite">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that represents composite directory contents.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileProviders.Embedded.xml b/xml/ns-Microsoft.Extensions.FileProviders.Embedded.xml
index 966daa9f80b..ae1dba12d2f 100644
--- a/xml/ns-Microsoft.Extensions.FileProviders.Embedded.xml
+++ b/xml/ns-Microsoft.Extensions.FileProviders.Embedded.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileProviders.Embedded">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that represents a file embedded in an assembly.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileProviders.Internal.xml b/xml/ns-Microsoft.Extensions.FileProviders.Internal.xml
index b863a26be8b..e69a1aec202 100644
--- a/xml/ns-Microsoft.Extensions.FileProviders.Internal.xml
+++ b/xml/ns-Microsoft.Extensions.FileProviders.Internal.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileProviders.Internal">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that represents the contents of a physical file directory.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileProviders.Physical.xml b/xml/ns-Microsoft.Extensions.FileProviders.Physical.xml
index de123121774..f0908770f98 100644
--- a/xml/ns-Microsoft.Extensions.FileProviders.Physical.xml
+++ b/xml/ns-Microsoft.Extensions.FileProviders.Physical.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileProviders.Physical">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides classes and enums for working with the physical file system.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileProviders.xml b/xml/ns-Microsoft.Extensions.FileProviders.xml
index 5c425cd1fce..ccd67bcfec3 100644
--- a/xml/ns-Microsoft.Extensions.FileProviders.xml
+++ b/xml/ns-Microsoft.Extensions.FileProviders.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileProviders">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides abstractions and implementations for accessing file systems.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Abstractions.xml b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Abstractions.xml
index 5f7ff02b7c0..dccb07b33fc 100644
--- a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Abstractions.xml
+++ b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Abstractions.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileSystemGlobbing.Abstractions">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains abstractions for file system entities and their wrapper implementations.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.PathSegments.xml b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.PathSegments.xml
index 6ea90e6f2f8..d2868d4ff71 100644
--- a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.PathSegments.xml
+++ b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.PathSegments.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileSystemGlobbing.Internal.PathSegments">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes that support the file system globbing infrastructure. These APIs are not intended for direct use and might change in future releases.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.PatternContexts.xml b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.PatternContexts.xml
index c3132eec5e8..98aeacd5736 100644
--- a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.PatternContexts.xml
+++ b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.PatternContexts.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileSystemGlobbing.Internal.PatternContexts">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and structs that support the file system globbing infrastructure. These APIs are not intended for direct use and might change in future releases.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.Patterns.xml b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.Patterns.xml
index 8521b3ad135..5326949ac1c 100644
--- a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.Patterns.xml
+++ b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.Patterns.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileSystemGlobbing.Internal.Patterns">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that supports the file system globbing infrastructure. This API is not intended for direct use and might change in future releases.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.xml b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.xml
index f35bedf2463..517bbe630e9 100644
--- a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.xml
+++ b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.Internal.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileSystemGlobbing.Internal">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes, structs, and interfaces that support the file system globbing infrastructure. These APIs are not intended for direct use and might change in future releases.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.xml b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.xml
index c77a5073718..b14af14a02d 100644
--- a/xml/ns-Microsoft.Extensions.FileSystemGlobbing.xml
+++ b/xml/ns-Microsoft.Extensions.FileSystemGlobbing.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.FileSystemGlobbing">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides classes and structs for file-system pattern matching.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Hosting.Testing.xml b/xml/ns-Microsoft.Extensions.Hosting.Testing.xml
index 013cce44363..2cd3cc947f8 100644
--- a/xml/ns-Microsoft.Extensions.Hosting.Testing.xml
+++ b/xml/ns-Microsoft.Extensions.Hosting.Testing.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Hosting.Testing">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and interfaces for unit testing a host.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Http.AutoClient.xml b/xml/ns-Microsoft.Extensions.Http.AutoClient.xml
index 900e5387be8..32e465d80dc 100644
--- a/xml/ns-Microsoft.Extensions.Http.AutoClient.xml
+++ b/xml/ns-Microsoft.Extensions.Http.AutoClient.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Http.AutoClient">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and enums for generating REST APIs and configuring HTTP client requests.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Http.Diagnostics.xml b/xml/ns-Microsoft.Extensions.Http.Diagnostics.xml
index 77eba560ef1..dafb831521f 100644
--- a/xml/ns-Microsoft.Extensions.Http.Diagnostics.xml
+++ b/xml/ns-Microsoft.Extensions.Http.Diagnostics.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Http.Diagnostics">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes, interfaces, and enums for managing HTTP diagnostics, including request metadata and redaction strategies.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Http.Latency.xml b/xml/ns-Microsoft.Extensions.Http.Latency.xml
index 25a3d018b09..b17642e180a 100644
--- a/xml/ns-Microsoft.Extensions.Http.Latency.xml
+++ b/xml/ns-Microsoft.Extensions.Http.Latency.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Http.Latency">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that provides options to configure HTTP client latency telemetry.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Http.Resilience.xml b/xml/ns-Microsoft.Extensions.Http.Resilience.xml
index 3e36e1fb460..de082c0ec28 100644
--- a/xml/ns-Microsoft.Extensions.Http.Resilience.xml
+++ b/xml/ns-Microsoft.Extensions.Http.Resilience.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Http.Resilience">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and interfaces for configuring HTTP resilience strategies, including retry, timeout, circuit breaker, hedging, and routing options.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Http.Telemetry.Latency.xml b/xml/ns-Microsoft.Extensions.Http.Telemetry.Latency.xml
index 0415dfccfe0..c9c91560fbf 100644
--- a/xml/ns-Microsoft.Extensions.Http.Telemetry.Latency.xml
+++ b/xml/ns-Microsoft.Extensions.Http.Telemetry.Latency.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Http.Telemetry.Latency">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for configuring and extending HTTP client latency telemetry.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Http.Telemetry.Logging.xml b/xml/ns-Microsoft.Extensions.Http.Telemetry.Logging.xml
index 7e0a4a00cb7..76138b65ebe 100644
--- a/xml/ns-Microsoft.Extensions.Http.Telemetry.Logging.xml
+++ b/xml/ns-Microsoft.Extensions.Http.Telemetry.Logging.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Http.Telemetry.Logging">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and interfaces for configuring and extending HTTP client request logging.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Http.Telemetry.xml b/xml/ns-Microsoft.Extensions.Http.Telemetry.xml
index 6fa08952ffe..1efee971229 100644
--- a/xml/ns-Microsoft.Extensions.Http.Telemetry.xml
+++ b/xml/ns-Microsoft.Extensions.Http.Telemetry.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Http.Telemetry">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes, interfaces, and enums for managing HTTP telemetry, including request metadata and redaction strategies.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.HttpClient.SocketHandling.xml b/xml/ns-Microsoft.Extensions.HttpClient.SocketHandling.xml
index 2f8bcdd74fb..601af2bd913 100644
--- a/xml/ns-Microsoft.Extensions.HttpClient.SocketHandling.xml
+++ b/xml/ns-Microsoft.Extensions.HttpClient.SocketHandling.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.HttpClient.SocketHandling">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for configuring and customizing <c>SocketsHttpHandler</c> instances for HTTP clients.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Localization.xml b/xml/ns-Microsoft.Extensions.Localization.xml
index ddf0a05176f..fa46a016085 100644
--- a/xml/ns-Microsoft.Extensions.Localization.xml
+++ b/xml/ns-Microsoft.Extensions.Localization.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Localization">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and interfaces for managing and providing localized strings and resources.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Logging.AzureAppServices.xml b/xml/ns-Microsoft.Extensions.Logging.AzureAppServices.xml
index e37aac40f32..9b9fe0be1e4 100644
--- a/xml/ns-Microsoft.Extensions.Logging.AzureAppServices.xml
+++ b/xml/ns-Microsoft.Extensions.Logging.AzureAppServices.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Logging.AzureAppServices">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for integrating logging with Azure App Services.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Logging.Testing.xml b/xml/ns-Microsoft.Extensions.Logging.Testing.xml
index 451bfa8a2b0..a6d86512c8b 100644
--- a/xml/ns-Microsoft.Extensions.Logging.Testing.xml
+++ b/xml/ns-Microsoft.Extensions.Logging.Testing.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Logging.Testing">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains utilities and classes for testing logging functionality.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.ObjectPool.xml b/xml/ns-Microsoft.Extensions.ObjectPool.xml
index a17028cf1dc..b742e71289c 100644
--- a/xml/ns-Microsoft.Extensions.ObjectPool.xml
+++ b/xml/ns-Microsoft.Extensions.ObjectPool.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.ObjectPool">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that provides configuration options for dependency injection pools.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Options.Contextual.Provider.xml b/xml/ns-Microsoft.Extensions.Options.Contextual.Provider.xml
index f6a04459a3c..33df5bcb891 100644
--- a/xml/ns-Microsoft.Extensions.Options.Contextual.Provider.xml
+++ b/xml/ns-Microsoft.Extensions.Options.Contextual.Provider.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Options.Contextual.Provider">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and interfaces for configuring and retrieving contextual options and collecting context data for options providers.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Options.Contextual.xml b/xml/ns-Microsoft.Extensions.Options.Contextual.xml
index 256452df4ab..9f67f1aaf38 100644
--- a/xml/ns-Microsoft.Extensions.Options.Contextual.xml
+++ b/xml/ns-Microsoft.Extensions.Options.Contextual.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Options.Contextual">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and interfaces for generating and managing contextual options and their associated contexts.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Options.Validation.xml b/xml/ns-Microsoft.Extensions.Options.Validation.xml
index 9bbc4a41451..1bd1a73cb37 100644
--- a/xml/ns-Microsoft.Extensions.Options.Validation.xml
+++ b/xml/ns-Microsoft.Extensions.Options.Validation.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Options.Validation">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes for validating options, including attributes for compile-time validation and extension methods for working with validation results.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Telemetry.Console.xml b/xml/ns-Microsoft.Extensions.Telemetry.Console.xml
index 0f477621e59..646d2d292ee 100644
--- a/xml/ns-Microsoft.Extensions.Telemetry.Console.xml
+++ b/xml/ns-Microsoft.Extensions.Telemetry.Console.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Telemetry.Console">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains classes and extensions for configuring and exporting telemetry data to the console, including latency and logging options.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.Time.Testing.xml b/xml/ns-Microsoft.Extensions.Time.Testing.xml
index 99f4a0e6b1c..8ddeabb5917 100644
--- a/xml/ns-Microsoft.Extensions.Time.Testing.xml
+++ b/xml/ns-Microsoft.Extensions.Time.Testing.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Time.Testing">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that represents a synthetic time provider that enables deterministic behavior in tests.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.VectorData.xml b/xml/ns-Microsoft.Extensions.VectorData.xml
index 7a7875d02a2..3b824ee8290 100644
--- a/xml/ns-Microsoft.Extensions.VectorData.xml
+++ b/xml/ns-Microsoft.Extensions.VectorData.xml
@@ -1,6 +1,8 @@
 <Namespace Name="Microsoft.Extensions.VectorData">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>
+      Contains classes and interfaces for vector data operations, including vector search, filtering, indexing, and mapping between storage and data models.
+    </summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.WebEncoders.Testing.xml b/xml/ns-Microsoft.Extensions.WebEncoders.Testing.xml
index 0d89685b878..a56ee9ffc2e 100644
--- a/xml/ns-Microsoft.Extensions.WebEncoders.Testing.xml
+++ b/xml/ns-Microsoft.Extensions.WebEncoders.Testing.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.WebEncoders.Testing">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains test HTML, JavaScript, and URL encoders for unit testing.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-Microsoft.Extensions.WebEncoders.xml b/xml/ns-Microsoft.Extensions.WebEncoders.xml
index f86b0ace445..ffdb81d94f6 100644
--- a/xml/ns-Microsoft.Extensions.WebEncoders.xml
+++ b/xml/ns-Microsoft.Extensions.WebEncoders.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.WebEncoders">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Contains a class that specifies encoder options.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Cloud.DocumentDb.xml b/xml/ns-System.Cloud.DocumentDb.xml
index 0f1078dd52e..69c01178336 100644
--- a/xml/ns-System.Cloud.DocumentDb.xml
+++ b/xml/ns-System.Cloud.DocumentDb.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.Cloud.DocumentDb">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types and interfaces for managing document-oriented (NoSQL) databases, including database configuration, query execution, transactional operations, and exception handling. </summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Cloud.Messaging.xml b/xml/ns-System.Cloud.Messaging.xml
index f8b869d072d..4e961fbb8ea 100644
--- a/xml/ns-System.Cloud.Messaging.xml
+++ b/xml/ns-System.Cloud.Messaging.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.Cloud.Messaging">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types and extension methods for building and managing asynchronous message processing pipelines.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Collections.Frozen.xml b/xml/ns-System.Collections.Frozen.xml
index 1fa3c1a236c..aea15688ce4 100644
--- a/xml/ns-System.Collections.Frozen.xml
+++ b/xml/ns-System.Collections.Frozen.xml
@@ -1,6 +1,8 @@
 <Namespace Name="System.Collections.Frozen">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>
+      Contains types that provide immutable, read-only collections optimized for fast lookup and enumeration.
+    </summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.CommandLine.Binding.xml b/xml/ns-System.CommandLine.Binding.xml
index fe54a258d0d..b7bfe7f2fcf 100644
--- a/xml/ns-System.CommandLine.Binding.xml
+++ b/xml/ns-System.CommandLine.Binding.xml
@@ -1,6 +1,9 @@
 <Namespace Name="System.CommandLine.Binding">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>
+      Provides types for binding command-line input to objects, including support for custom types,
+      binding contexts, and value descriptors.
+    </summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.CommandLine.Builder.xml b/xml/ns-System.CommandLine.Builder.xml
index 7a766f40f9f..c08f496b0b7 100644
--- a/xml/ns-System.CommandLine.Builder.xml
+++ b/xml/ns-System.CommandLine.Builder.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.CommandLine.Builder">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides classes and extension methods for building and configuring command-line applications.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.CommandLine.Completions.xml b/xml/ns-System.CommandLine.Completions.xml
index 50593f27380..0c35314ada2 100644
--- a/xml/ns-System.CommandLine.Completions.xml
+++ b/xml/ns-System.CommandLine.Completions.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.CommandLine.Completions">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types and interfaces for command-line completion operations, including contexts, items, and sources for generating completions.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.CommandLine.Help.xml b/xml/ns-System.CommandLine.Help.xml
index 405cb4f54b3..7840230bf45 100644
--- a/xml/ns-System.CommandLine.Help.xml
+++ b/xml/ns-System.CommandLine.Help.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.CommandLine.Help">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types and methods for formatting and displaying command-line help.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.CommandLine.IO.xml b/xml/ns-System.CommandLine.IO.xml
index 101f5f4656a..d688d5d3a34 100644
--- a/xml/ns-System.CommandLine.IO.xml
+++ b/xml/ns-System.CommandLine.IO.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.CommandLine.IO">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types for working with standard input, output, and error streams, including in-memory and console-based implementations.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.CommandLine.Invocation.xml b/xml/ns-System.CommandLine.Invocation.xml
index f7bbbb2e8e2..7ceb5e7da55 100644
--- a/xml/ns-System.CommandLine.Invocation.xml
+++ b/xml/ns-System.CommandLine.Invocation.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.CommandLine.Invocation">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types for handling command invocation, including context, handlers, results, middleware, and middleware ordering.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.CommandLine.Parsing.xml b/xml/ns-System.CommandLine.Parsing.xml
index 1444170f2db..6b3bb0d7d4c 100644
--- a/xml/ns-System.CommandLine.Parsing.xml
+++ b/xml/ns-System.CommandLine.Parsing.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.CommandLine.Parsing">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types and methods for parsing command-line input, including arguments, options, commands, and tokens.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.CommandLine.xml b/xml/ns-System.CommandLine.xml
index 97bbbcf2d5c..77d13ea923d 100644
--- a/xml/ns-System.CommandLine.xml
+++ b/xml/ns-System.CommandLine.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.CommandLine">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types for defining commands, options, arguments, and their relationships in command-line applications.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Data.Sql.xml b/xml/ns-System.Data.Sql.xml
index dc91697f16c..026be8ae52a 100644
--- a/xml/ns-System.Data.Sql.xml
+++ b/xml/ns-System.Data.Sql.xml
@@ -4,11 +4,7 @@
     <remarks>
       <format type="text/markdown"><![CDATA[
 
-## Remarks
- For information about the functionality that the classes within this namespace support, see [Enumerating Instances of SQL Server (ADO.NET)](/dotnet/framework/data/adonet/sql/enumerating-instances-of-sql-server) and [Query Notifications in SQL Server](/dotnet/framework/data/adonet/sql/query-notifications-in-sql-server).
-
-> [!NOTE]
->  In beta releases of ADO.NET version 2.0, the <xref:System.Data.Sql> namespace also contained classes for use with SQL Server common language runtime (CLR) integration. However, those classes have been moved into their own namespace, <xref:Microsoft.SqlServer.Server>. For more information about using SQL Server CLR integration, see [SQL Server Common Language Runtime Integration](/dotnet/framework/data/adonet/sql/sql-server-common-language-runtime-integration).
+For information about the functionality of the classes within this namespace, see [Enumerating Instances of SQL Server (ADO.NET)](/dotnet/framework/data/adonet/sql/enumerating-instances-of-sql-server) and [Query Notifications in SQL Server](/dotnet/framework/data/adonet/sql/query-notifications-in-sql-server).
 
  ]]></format>
     </remarks>
diff --git a/xml/ns-System.Drawing.Design.xml b/xml/ns-System.Drawing.Design.xml
index 8d1d8cf4485..a523afae166 100644
--- a/xml/ns-System.Drawing.Design.xml
+++ b/xml/ns-System.Drawing.Design.xml
@@ -8,7 +8,7 @@
  The classes in this namespace can be used to create custom toolbox items, type-specific value editors that can edit and graphically represent values of their supported types, and type converters that can convert values between certain types. This namespace provides the basic frameworks for developing extensions to the design-time UI.
 
 > [!CAUTION]
->  Classes within the <xref:System.Drawing.Design> namespace are not supported for use within a Windows or ASP.NET service. Attempting to use these classes from within one of these application types may produce unexpected problems, such as diminished service performance and run-time exceptions.
+> Classes within the <xref:System.Drawing.Design> namespace are not supported for use within a Windows or ASP.NET service. Attempting to use these classes from within one of these application types might produce unexpected problems, such as diminished service performance and run-time exceptions.
 
  ]]></format>
     </remarks>
diff --git a/xml/ns-System.Formats.Nrbf.xml b/xml/ns-System.Formats.Nrbf.xml
index cfbc4d9a43b..c4d9ff4271a 100644
--- a/xml/ns-System.Formats.Nrbf.xml
+++ b/xml/ns-System.Formats.Nrbf.xml
@@ -1,6 +1,9 @@
 <Namespace Name="System.Formats.Nrbf">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>
+      Provides classes and utilities for working with .NET Remoting Binary Format (NRBF) encoded data,
+      including support for decoding payloads, handling serialization records, and managing array and class records.
+    </summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Globalization.xml b/xml/ns-System.Globalization.xml
index eb5e575c8ac..938c79077b9 100644
--- a/xml/ns-System.Globalization.xml
+++ b/xml/ns-System.Globalization.xml
@@ -9,7 +9,6 @@
 The following blogs include discussions of the <xref:System.Globalization> namespace and its classes:
 
 - <https://learn.microsoft.com/archive/blogs/shawnste/>
-
 - <https://learn.microsoft.com/archive/blogs/kierans/>
 
 Two of the .NET types in this namespace, <xref:System.Globalization.CultureAndRegionInfoBuilder> and <xref:System.Globalization.CultureAndRegionModifiers>, are found in an assembly named *sysglobl.dll*. To successfully compile code that uses these types, add a reference to sysglobl.dll.
diff --git a/xml/ns-System.Net.Http.xml b/xml/ns-System.Net.Http.xml
index 3a9a0c03374..bf2da35abf0 100644
--- a/xml/ns-System.Net.Http.xml
+++ b/xml/ns-System.Net.Http.xml
@@ -44,6 +44,5 @@ If your app uses the <xref:System.Net.Http> and <xref:System.Net.Http.Headers> n
  ]]></format>
     </remarks>
     <altmember cref="N:System.Net.Http.Headers" />
-    <related type="Article" href="https://learn.microsoft.com/previous-versions/windows/apps/hh761504(v=win.10)">Connecting to a web service</related>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Net.ServerSentEvents.xml b/xml/ns-System.Net.ServerSentEvents.xml
index a841ab09ce5..cb09e365e90 100644
--- a/xml/ns-System.Net.ServerSentEvents.xml
+++ b/xml/ns-System.Net.ServerSentEvents.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.Net.ServerSentEvents">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides classes and delegates for working with server-sent events, including formatting, parsing, and representing event data.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Numerics.Tensors.xml b/xml/ns-System.Numerics.Tensors.xml
index dcf4dcdc5b5..8bda6394980 100644
--- a/xml/ns-System.Numerics.Tensors.xml
+++ b/xml/ns-System.Numerics.Tensors.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.Numerics.Tensors">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides types and methods for tensor operations and memory management.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Runtime.Diagnostics.xml b/xml/ns-System.Runtime.Diagnostics.xml
deleted file mode 100644
index 79c122dc268..00000000000
--- a/xml/ns-System.Runtime.Diagnostics.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<Namespace Name="System.Runtime.Diagnostics">
-  <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
-  </Docs>
-</Namespace>
diff --git a/xml/ns-System.Runtime.Intrinsics.Arm.Arm64.xml b/xml/ns-System.Runtime.Intrinsics.Arm.Arm64.xml
deleted file mode 100644
index 9bd535711dd..00000000000
--- a/xml/ns-System.Runtime.Intrinsics.Arm.Arm64.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<Namespace Name="System.Runtime.Intrinsics.Arm.Arm64">
-  <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
-  </Docs>
-</Namespace>
diff --git a/xml/ns-System.Runtime.Intrinsics.Arm.xml b/xml/ns-System.Runtime.Intrinsics.Arm.xml
index 10ae580b319..2cfa1e059f8 100644
--- a/xml/ns-System.Runtime.Intrinsics.Arm.xml
+++ b/xml/ns-System.Runtime.Intrinsics.Arm.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.Runtime.Intrinsics.Arm">
   <Docs>
-    <summary>Exposes select instruction-set extensions for ARM systems. These instruction sets are expressed as separate classes for each extension. Support for any extension within the current environment can be determined by querying the <see langword="IsSupported" /> property on the respective type.</summary>
+    <summary>Exposes select instruction-set extensions for ARM systems. These instruction sets are expressed as separate classes for each extension. You can determine support for any extension within the current environment by querying the <see langword="IsSupported" /> property on the respective type.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Runtime.Loader.xml b/xml/ns-System.Runtime.Loader.xml
index ef9c2e833f2..a3819318ae9 100644
--- a/xml/ns-System.Runtime.Loader.xml
+++ b/xml/ns-System.Runtime.Loader.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.Runtime.Loader">
   <Docs>
-    <summary>Provides interfaces and classes to allow developers the opportunity to influence runtime loading behavior.</summary>
+    <summary>Provides interfaces and classes to influence runtime loading behavior.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Runtime.Remoting.Channels.Smtp.xml b/xml/ns-System.Runtime.Remoting.Channels.Smtp.xml
deleted file mode 100644
index 56fcfdf6e8f..00000000000
--- a/xml/ns-System.Runtime.Remoting.Channels.Smtp.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<Namespace Name="System.Runtime.Remoting.Channels.Smtp">
-  <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
-  </Docs>
-</Namespace>
diff --git a/xml/ns-System.Runtime.xml b/xml/ns-System.Runtime.xml
index ed16cba8525..31c9a8cd6de 100644
--- a/xml/ns-System.Runtime.xml
+++ b/xml/ns-System.Runtime.xml
@@ -1,11 +1,10 @@
 <Namespace Name="System.Runtime">
   <Docs>
-    <summary>Contains advanced types that support diverse namespaces such as the <see langword="System" />, <see langword="Runtime" />, and the <see langword="Security" /> namespaces.</summary>
+    <summary>Contains advanced types that support diverse namespaces such as the <see langword="System" />, <see langword="Runtime" />, and <see langword="Security" /> namespaces.</summary>
     <remarks>
       <format type="text/markdown"><![CDATA[
 
-## Remarks
- The types found in this namespace are intended for use in advanced development.
+The types found in this namespace are intended for use in advanced development.
 
  ]]></format>
     </remarks>
diff --git a/xml/ns-System.Text.Json.Schema.xml b/xml/ns-System.Text.Json.Schema.xml
index 11492b086e5..a9dd898f3af 100644
--- a/xml/ns-System.Text.Json.Schema.xml
+++ b/xml/ns-System.Text.Json.Schema.xml
@@ -1,6 +1,6 @@
 <Namespace Name="System.Text.Json.Schema">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides functionality for generating JSON schema objects from .NET types using metadata and context.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Text.Json.Serialization.Metadata.xml b/xml/ns-System.Text.Json.Serialization.Metadata.xml
index 58c121a3dc4..29e429fafe3 100644
--- a/xml/ns-System.Text.Json.Serialization.Metadata.xml
+++ b/xml/ns-System.Text.Json.Serialization.Metadata.xml
@@ -1,6 +1,8 @@
 <Namespace Name="System.Text.Json.Serialization.Metadata">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>
+      Contains classes, structs, and interfaces that provide metadata and configuration for JSON serialization and deserialization in System.Text.Json.
+    </summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>
diff --git a/xml/ns-System.Text.Json.SourceGeneration.xml b/xml/ns-System.Text.Json.SourceGeneration.xml
deleted file mode 100644
index 83fa5901317..00000000000
--- a/xml/ns-System.Text.Json.SourceGeneration.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<Namespace Name="System.Text.Json.SourceGeneration">
-  <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
-  </Docs>
-</Namespace>
diff --git a/xml/ns-System.Web.UI.MobileControls.ShippedAdapterSource.xml b/xml/ns-System.Web.UI.MobileControls.ShippedAdapterSource.xml
deleted file mode 100644
index ba245eade28..00000000000
--- a/xml/ns-System.Web.UI.MobileControls.ShippedAdapterSource.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<Namespace Name="System.Web.UI.MobileControls.ShippedAdapterSource">
-  <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
-  </Docs>
-</Namespace>
diff --git a/xml/ns-System.Windows.Forms.Analyzers.xml b/xml/ns-System.Windows.Forms.Analyzers.xml
deleted file mode 100644
index f1747197e82..00000000000
--- a/xml/ns-System.Windows.Forms.Analyzers.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<Namespace Name="System.Windows.Forms.Analyzers">
-  <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
-  </Docs>
-</Namespace>
diff --git a/xml/ns-System.Windows.Forms.Design.Resources.xml b/xml/ns-System.Windows.Forms.Design.Resources.xml
deleted file mode 100644
index 4667885d74b..00000000000
--- a/xml/ns-System.Windows.Forms.Design.Resources.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<Namespace Name="System.Windows.Forms.Design.Resources">
-  <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
-  </Docs>
-</Namespace>