diff --git a/xml/Microsoft.Extensions.FileProviders.Composite/CompositeDirectoryContents.xml b/xml/Microsoft.Extensions.FileProviders.Composite/CompositeDirectoryContents.xml
index 7a5ce9b9f1c..442edd08cca 100644
--- a/xml/Microsoft.Extensions.FileProviders.Composite/CompositeDirectoryContents.xml
+++ b/xml/Microsoft.Extensions.FileProviders.Composite/CompositeDirectoryContents.xml
@@ -1,4 +1,4 @@
-<Type Name="CompositeDirectoryContents" FullName="Microsoft.Extensions.FileProviders.Composite.CompositeDirectoryContents">
+<Type Name="CompositeDirectoryContents" FullName="Microsoft.Extensions.FileProviders.Composite.CompositeDirectoryContents">
   <TypeSignature Language="C#" Value="public class CompositeDirectoryContents : Microsoft.Extensions.FileProviders.IDirectoryContents, System.Collections.Generic.IEnumerable&lt;Microsoft.Extensions.FileProviders.IFileInfo&gt;" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit CompositeDirectoryContents extends System.Object implements class Microsoft.Extensions.FileProviders.IDirectoryContents, class System.Collections.Generic.IEnumerable`1&lt;class Microsoft.Extensions.FileProviders.IFileInfo&gt;, class System.Collections.IEnumerable" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.Composite.CompositeDirectoryContents" />
@@ -158,9 +158,17 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Returns an enumerator that iterates through a collection.</summary>
+        <returns>An enumerator that can be used to iterate through the collection.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+This member is an explicit interface member implementation. It can be used only when the <xref:Microsoft.Extensions.FileProviders.Composite.CompositeDirectoryContents> instance is cast to an <xref:System.Collections.IEnumerable> interface.
+
+          ]]></format>
+        </remarks>
       </Docs>
     </Member>
   </Members>
diff --git a/xml/Microsoft.Extensions.FileProviders.Embedded/EmbeddedResourceFileInfo.xml b/xml/Microsoft.Extensions.FileProviders.Embedded/EmbeddedResourceFileInfo.xml
index 63829e35223..6ca8758c3a2 100644
--- a/xml/Microsoft.Extensions.FileProviders.Embedded/EmbeddedResourceFileInfo.xml
+++ b/xml/Microsoft.Extensions.FileProviders.Embedded/EmbeddedResourceFileInfo.xml
@@ -1,4 +1,4 @@
-<Type Name="EmbeddedResourceFileInfo" FullName="Microsoft.Extensions.FileProviders.Embedded.EmbeddedResourceFileInfo">
+<Type Name="EmbeddedResourceFileInfo" FullName="Microsoft.Extensions.FileProviders.Embedded.EmbeddedResourceFileInfo">
   <TypeSignature Language="C#" Value="public class EmbeddedResourceFileInfo : Microsoft.Extensions.FileProviders.IFileInfo" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit EmbeddedResourceFileInfo extends System.Object implements class Microsoft.Extensions.FileProviders.IFileInfo" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.Embedded.EmbeddedResourceFileInfo" />
@@ -87,9 +87,17 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Returns the file contents as a read-only stream.</summary>
+        <returns>A read-only stream.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+The caller should dispose the stream when done with it.
+
+          ]]></format>
+        </remarks>
         <inheritdoc />
       </Docs>
     </Member>
diff --git a/xml/Microsoft.Extensions.FileProviders.Internal/PhysicalDirectoryContents.xml b/xml/Microsoft.Extensions.FileProviders.Internal/PhysicalDirectoryContents.xml
index ae30923f547..d55197c6dd0 100644
--- a/xml/Microsoft.Extensions.FileProviders.Internal/PhysicalDirectoryContents.xml
+++ b/xml/Microsoft.Extensions.FileProviders.Internal/PhysicalDirectoryContents.xml
@@ -1,4 +1,4 @@
-<Type Name="PhysicalDirectoryContents" FullName="Microsoft.Extensions.FileProviders.Internal.PhysicalDirectoryContents">
+<Type Name="PhysicalDirectoryContents" FullName="Microsoft.Extensions.FileProviders.Internal.PhysicalDirectoryContents">
   <TypeSignature Language="C#" Value="public class PhysicalDirectoryContents : Microsoft.Extensions.FileProviders.IDirectoryContents, System.Collections.Generic.IEnumerable&lt;Microsoft.Extensions.FileProviders.IFileInfo&gt;" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit PhysicalDirectoryContents extends System.Object implements class Microsoft.Extensions.FileProviders.IDirectoryContents, class System.Collections.Generic.IEnumerable`1&lt;class Microsoft.Extensions.FileProviders.IFileInfo&gt;, class System.Collections.IEnumerable" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.Internal.PhysicalDirectoryContents" />
@@ -113,8 +113,8 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Determines if a directory was located at the given path.</summary>
+        <value><see langword="true" /> if a directory was located at the given path; <see langword="false" /> otherwise.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
@@ -145,8 +145,8 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <summary>Returns an enumerator that iterates through the collection.</summary>
+        <returns>An enumerator that can be used to iterate through the collection.</returns>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
@@ -177,9 +177,17 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Returns an enumerator that iterates through a collection.</summary>
+        <returns>An enumerator that can be used to iterate through the collection.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+This member is an explicit interface member implementation. It can be used only when the <xref:Microsoft.Extensions.FileProviders.Internal.PhysicalDirectoryContents> instance is cast to an <xref:System.Collections.IEnumerable> interface.
+
+          ]]></format>
+        </remarks>
       </Docs>
     </Member>
   </Members>
diff --git a/xml/Microsoft.Extensions.FileProviders.Physical/PhysicalDirectoryInfo.xml b/xml/Microsoft.Extensions.FileProviders.Physical/PhysicalDirectoryInfo.xml
index 54c19a0f127..bf2d907df4a 100644
--- a/xml/Microsoft.Extensions.FileProviders.Physical/PhysicalDirectoryInfo.xml
+++ b/xml/Microsoft.Extensions.FileProviders.Physical/PhysicalDirectoryInfo.xml
@@ -1,4 +1,4 @@
-<Type Name="PhysicalDirectoryInfo" FullName="Microsoft.Extensions.FileProviders.Physical.PhysicalDirectoryInfo">
+<Type Name="PhysicalDirectoryInfo" FullName="Microsoft.Extensions.FileProviders.Physical.PhysicalDirectoryInfo">
   <TypeSignature Language="C#" Value="public class PhysicalDirectoryInfo : Microsoft.Extensions.FileProviders.IFileInfo" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit PhysicalDirectoryInfo extends System.Object implements class Microsoft.Extensions.FileProviders.IFileInfo" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.Physical.PhysicalDirectoryInfo" />
@@ -116,8 +116,8 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Determines if the resource exists in the underlying storage system.</summary>
+        <value><see langword="true" /> if the resource exists in the underlying storage system; <see langword="false" /> otherwise.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
@@ -241,8 +241,8 @@
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets the name of the file or directory, excluding the path.</summary>
+        <value>A string representing the name of the file or directory.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
@@ -273,8 +273,8 @@
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets the full path to the file, including the file name.</summary>
+        <value>A string representing the full path to the file, or <see langword="null" /> if the file is not directly accessible.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
diff --git a/xml/Microsoft.Extensions.FileProviders.Physical/PhysicalFileInfo.xml b/xml/Microsoft.Extensions.FileProviders.Physical/PhysicalFileInfo.xml
index 627bdf935fd..bdbc3ea9b37 100644
--- a/xml/Microsoft.Extensions.FileProviders.Physical/PhysicalFileInfo.xml
+++ b/xml/Microsoft.Extensions.FileProviders.Physical/PhysicalFileInfo.xml
@@ -1,4 +1,4 @@
-<Type Name="PhysicalFileInfo" FullName="Microsoft.Extensions.FileProviders.Physical.PhysicalFileInfo">
+<Type Name="PhysicalFileInfo" FullName="Microsoft.Extensions.FileProviders.Physical.PhysicalFileInfo">
   <TypeSignature Language="C#" Value="public class PhysicalFileInfo : Microsoft.Extensions.FileProviders.IFileInfo" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit PhysicalFileInfo extends System.Object implements class Microsoft.Extensions.FileProviders.IFileInfo" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.Physical.PhysicalFileInfo" />
@@ -84,9 +84,16 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Returns the file contents as a read-only stream.</summary>
+        <returns>A read-only stream.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[
+## Remarks
+
+The caller should dispose the stream when done with it.
+
+          ]]></format>
+        </remarks>
         <inheritdoc />
       </Docs>
     </Member>
@@ -116,8 +123,8 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Determines if the resource exists in the underlying system.</summary>
+        <value><see langword="true" /> if the resource exists in the underlying storage system; <see langword="false" /> otherwise.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
@@ -179,8 +186,8 @@
         <ReturnType>System.DateTimeOffset</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets the last time the file was modified.</summary>
+        <value>A datetime offset representing the last time the file was modified.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
@@ -211,7 +218,7 @@
         <ReturnType>System.Int64</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>The length of the file in bytes, or -1 for a directory or non-existing files.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
@@ -243,7 +250,7 @@
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>The name of the file or directory, not including any path.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
@@ -275,7 +282,7 @@
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>The path to the file, including the file name. Return <see langword="null" /> if the file is not directly accessible.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
diff --git a/xml/Microsoft.Extensions.FileProviders.Physical/PollingWildCardChangeToken.xml b/xml/Microsoft.Extensions.FileProviders.Physical/PollingWildCardChangeToken.xml
index d1f4af1e15e..7e973aceef1 100644
--- a/xml/Microsoft.Extensions.FileProviders.Physical/PollingWildCardChangeToken.xml
+++ b/xml/Microsoft.Extensions.FileProviders.Physical/PollingWildCardChangeToken.xml
@@ -1,4 +1,4 @@
-<Type Name="PollingWildCardChangeToken" FullName="Microsoft.Extensions.FileProviders.Physical.PollingWildCardChangeToken">
+<Type Name="PollingWildCardChangeToken" FullName="Microsoft.Extensions.FileProviders.Physical.PollingWildCardChangeToken">
   <TypeSignature Language="C#" Value="public class PollingWildCardChangeToken : Microsoft.Extensions.Primitives.IChangeToken" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit PollingWildCardChangeToken extends System.Object implements class Microsoft.Extensions.Primitives.IChangeToken" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.Physical.PollingWildCardChangeToken" />
@@ -82,7 +82,7 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Indicates if this token will pro-actively raise callbacks. If <see langword="false" />, the token consumer must poll <see cref="P:Microsoft.Extensions.Primitives.IChangeToken.HasChanged" /> to detect changes.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
@@ -144,7 +144,7 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Gets a value that indicates if a change has occurred.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
@@ -179,10 +179,11 @@
         <Parameter Name="state" Type="System.Object" />
       </Parameters>
       <Docs>
-        <param name="callback">To be added.</param>
-        <param name="state">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="callback">The <see cref="T:System.Action`1" /> to invoke.</param>
+        <param name="state">State to be passed into the callback.</param>
+        <summary>Registers for a callback that will be invoked when the entry has changed.
+ <see cref="P:Microsoft.Extensions.Primitives.IChangeToken.HasChanged" /> MUST be set before the callback is invoked.</summary>
+        <returns>An <see cref="T:System.IDisposable" /> that is used to unregister the callback.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
diff --git a/xml/Microsoft.Extensions.FileProviders/ManifestEmbeddedFileProvider.xml b/xml/Microsoft.Extensions.FileProviders/ManifestEmbeddedFileProvider.xml
index 8b0f89d9d04..26dc41fd22e 100644
--- a/xml/Microsoft.Extensions.FileProviders/ManifestEmbeddedFileProvider.xml
+++ b/xml/Microsoft.Extensions.FileProviders/ManifestEmbeddedFileProvider.xml
@@ -1,4 +1,4 @@
-<Type Name="ManifestEmbeddedFileProvider" FullName="Microsoft.Extensions.FileProviders.ManifestEmbeddedFileProvider">
+<Type Name="ManifestEmbeddedFileProvider" FullName="Microsoft.Extensions.FileProviders.ManifestEmbeddedFileProvider">
   <TypeSignature Language="C#" Value="public class ManifestEmbeddedFileProvider : Microsoft.Extensions.FileProviders.IFileProvider" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit ManifestEmbeddedFileProvider extends System.Object implements class Microsoft.Extensions.FileProviders.IFileProvider" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.ManifestEmbeddedFileProvider" />
@@ -186,9 +186,9 @@
         <Parameter Name="subpath" Type="System.String" />
       </Parameters>
       <Docs>
-        <param name="subpath">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="subpath">Relative path that identifies the directory.</param>
+        <summary>Enumerate a directory at the given path, if any.</summary>
+        <returns>Returns the contents of the directory.</returns>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
@@ -218,9 +218,9 @@
         <Parameter Name="subpath" Type="System.String" />
       </Parameters>
       <Docs>
-        <param name="subpath">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="subpath">Relative path that identifies the file.</param>
+        <summary>Locate a file at the given path.</summary>
+        <returns>The file information. Caller must check Exists property.</returns>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
@@ -250,9 +250,9 @@
         <Parameter Name="filter" Type="System.String" />
       </Parameters>
       <Docs>
-        <param name="filter">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="filter">Filter string used to determine what files or folders to monitor. Example: **/*.cs, *.*, subFolder/**/*.cshtml.</param>
+        <summary>Creates a <see cref="T:Microsoft.Extensions.Primitives.IChangeToken" /> for the specified <paramref name="filter" />.</summary>
+        <returns>An <see cref="T:Microsoft.Extensions.Primitives.IChangeToken" /> that is notified when a file matching <paramref name="filter" /> is added, modified or deleted.</returns>
         <remarks>To be added.</remarks>
         <inheritdoc />
       </Docs>
diff --git a/xml/Microsoft.Extensions.FileProviders/NotFoundDirectoryContents.xml b/xml/Microsoft.Extensions.FileProviders/NotFoundDirectoryContents.xml
index 925f15d501c..1a015c983d0 100644
--- a/xml/Microsoft.Extensions.FileProviders/NotFoundDirectoryContents.xml
+++ b/xml/Microsoft.Extensions.FileProviders/NotFoundDirectoryContents.xml
@@ -1,4 +1,4 @@
-<Type Name="NotFoundDirectoryContents" FullName="Microsoft.Extensions.FileProviders.NotFoundDirectoryContents">
+<Type Name="NotFoundDirectoryContents" FullName="Microsoft.Extensions.FileProviders.NotFoundDirectoryContents">
   <TypeSignature Language="C#" Value="public class NotFoundDirectoryContents : Microsoft.Extensions.FileProviders.IDirectoryContents, System.Collections.Generic.IEnumerable&lt;Microsoft.Extensions.FileProviders.IFileInfo&gt;" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit NotFoundDirectoryContents extends System.Object implements class Microsoft.Extensions.FileProviders.IDirectoryContents, class System.Collections.Generic.IEnumerable`1&lt;class Microsoft.Extensions.FileProviders.IFileInfo&gt;, class System.Collections.IEnumerable" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.NotFoundDirectoryContents" />
@@ -176,9 +176,17 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <summary>Returns an enumerator that iterates through a collection.</summary>
+        <returns>An <see cref="T:System.Collections.IEnumerator" /> object that can be used to iterate through the collection.</returns>
+        <remarks>
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+This member is an explicit interface member implementation. It can be used only when the <xref:Microsoft.Extensions.FileProviders.NotFoundDirectoryContents> instance is cast to an <xref:System.Collections.IEnumerable> interface.
+
+          ]]></format>
+        </remarks>
         <inheritdoc />
       </Docs>
     </Member>
diff --git a/xml/Microsoft.Extensions.FileProviders/NotFoundFileInfo.xml b/xml/Microsoft.Extensions.FileProviders/NotFoundFileInfo.xml
index 2b9547d6c16..6d578dcd694 100644
--- a/xml/Microsoft.Extensions.FileProviders/NotFoundFileInfo.xml
+++ b/xml/Microsoft.Extensions.FileProviders/NotFoundFileInfo.xml
@@ -1,4 +1,4 @@
-<Type Name="NotFoundFileInfo" FullName="Microsoft.Extensions.FileProviders.NotFoundFileInfo">
+<Type Name="NotFoundFileInfo" FullName="Microsoft.Extensions.FileProviders.NotFoundFileInfo">
   <TypeSignature Language="C#" Value="public class NotFoundFileInfo : Microsoft.Extensions.FileProviders.IFileInfo" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit NotFoundFileInfo extends System.Object implements class Microsoft.Extensions.FileProviders.IFileInfo" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.FileProviders.NotFoundFileInfo" />
@@ -240,7 +240,7 @@
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>The name of the file or directory, not including any path.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
         <inheritdoc />
diff --git a/xml/Microsoft.Extensions.Hosting.Internal/ConsoleLifetime.xml b/xml/Microsoft.Extensions.Hosting.Internal/ConsoleLifetime.xml
index f2a47b2f822..95ce3c5323b 100644
--- a/xml/Microsoft.Extensions.Hosting.Internal/ConsoleLifetime.xml
+++ b/xml/Microsoft.Extensions.Hosting.Internal/ConsoleLifetime.xml
@@ -1,4 +1,4 @@
-<Type Name="ConsoleLifetime" FullName="Microsoft.Extensions.Hosting.Internal.ConsoleLifetime">
+<Type Name="ConsoleLifetime" FullName="Microsoft.Extensions.Hosting.Internal.ConsoleLifetime">
   <TypeSignature Language="C#" Value="public class ConsoleLifetime : IDisposable, Microsoft.Extensions.Hosting.IHostLifetime" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit ConsoleLifetime extends System.Object implements class Microsoft.Extensions.Hosting.IHostLifetime, class System.IDisposable" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.Hosting.Internal.ConsoleLifetime" />
@@ -139,7 +139,7 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -169,9 +169,9 @@
         <Parameter Name="cancellationToken" Type="System.Threading.CancellationToken" />
       </Parameters>
       <Docs>
-        <param name="cancellationToken">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="cancellationToken">Used to indicate when stop should no longer be graceful.</param>
+        <summary>Called from <see cref="M:Microsoft.Extensions.Hosting.IHost.StopAsync(System.Threading.CancellationToken)" /> to indicate that the host is stopping and it's time to shut down.</summary>
+        <returns>A <see cref="T:System.Threading.Tasks.Task" />.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -201,9 +201,9 @@
         <Parameter Name="cancellationToken" Type="System.Threading.CancellationToken" />
       </Parameters>
       <Docs>
-        <param name="cancellationToken">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="cancellationToken">Used to indicate when stop should no longer be graceful.</param>
+        <summary>Called at the start of <see cref="M:Microsoft.Extensions.Hosting.IHost.StartAsync(System.Threading.CancellationToken)" /> which will wait until it's complete before continuing. This can be used to delay startup until signaled by an external event.</summary>
+        <returns>A <see cref="T:System.Threading.Tasks.Task" />.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
diff --git a/xml/Microsoft.Extensions.Hosting.Internal/HostingEnvironment.xml b/xml/Microsoft.Extensions.Hosting.Internal/HostingEnvironment.xml
index a2dd29d6ca2..eb7c5f16a9d 100644
--- a/xml/Microsoft.Extensions.Hosting.Internal/HostingEnvironment.xml
+++ b/xml/Microsoft.Extensions.Hosting.Internal/HostingEnvironment.xml
@@ -1,4 +1,4 @@
-<Type Name="HostingEnvironment" FullName="Microsoft.Extensions.Hosting.Internal.HostingEnvironment">
+<Type Name="HostingEnvironment" FullName="Microsoft.Extensions.Hosting.Internal.HostingEnvironment">
   <TypeSignature Language="C#" Value="public class HostingEnvironment : Microsoft.Extensions.Hosting.IHostingEnvironment" FrameworkAlternate="dotnet-plat-ext-2.1;dotnet-plat-ext-2.2" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit HostingEnvironment extends System.Object implements class Microsoft.Extensions.Hosting.IHostingEnvironment" FrameworkAlternate="dotnet-plat-ext-2.1;dotnet-plat-ext-2.2" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.Hosting.Internal.HostingEnvironment" />
@@ -81,7 +81,7 @@
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Gets or sets the name of the application. This property is automatically set by the host to the assembly containing the application entry point.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
       </Docs>
@@ -110,7 +110,7 @@
         <ReturnType>Microsoft.Extensions.FileProviders.IFileProvider</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Gets or sets an <see cref="T:Microsoft.Extensions.FileProviders.IFileProvider" /> pointing at <see cref="P:Microsoft.Extensions.Hosting.IHostingEnvironment.ContentRootPath" />.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
       </Docs>
@@ -139,7 +139,7 @@
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Gets or sets the absolute path to the directory that contains the application content files.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
       </Docs>
@@ -168,7 +168,7 @@
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Gets or sets the name of the environment. The host automatically sets this property to the value of the of the "environment" key as specified in configuration.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
       </Docs>
diff --git a/xml/Microsoft.Extensions.Hosting/BackgroundService.xml b/xml/Microsoft.Extensions.Hosting/BackgroundService.xml
index 11b04454eb5..31d9b93c96f 100644
--- a/xml/Microsoft.Extensions.Hosting/BackgroundService.xml
+++ b/xml/Microsoft.Extensions.Hosting/BackgroundService.xml
@@ -1,4 +1,4 @@
-<Type Name="BackgroundService" FullName="Microsoft.Extensions.Hosting.BackgroundService">
+<Type Name="BackgroundService" FullName="Microsoft.Extensions.Hosting.BackgroundService">
   <TypeSignature Language="C#" Value="public abstract class BackgroundService : IDisposable, Microsoft.Extensions.Hosting.IHostedService" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi abstract beforefieldinit BackgroundService extends System.Object implements class Microsoft.Extensions.Hosting.IHostedService, class System.IDisposable" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.Hosting.BackgroundService" />
@@ -74,7 +74,7 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
diff --git a/xml/Microsoft.Extensions.Options/ConfigurationChangeTokenSource`1.xml b/xml/Microsoft.Extensions.Options/ConfigurationChangeTokenSource`1.xml
index 7ad89c43794..e451f54010a 100644
--- a/xml/Microsoft.Extensions.Options/ConfigurationChangeTokenSource`1.xml
+++ b/xml/Microsoft.Extensions.Options/ConfigurationChangeTokenSource`1.xml
@@ -1,4 +1,4 @@
-<Type Name="ConfigurationChangeTokenSource&lt;TOptions&gt;" FullName="Microsoft.Extensions.Options.ConfigurationChangeTokenSource&lt;TOptions&gt;">
+<Type Name="ConfigurationChangeTokenSource&lt;TOptions&gt;" FullName="Microsoft.Extensions.Options.ConfigurationChangeTokenSource&lt;TOptions&gt;">
   <TypeSignature Language="C#" Value="public class ConfigurationChangeTokenSource&lt;TOptions&gt; : Microsoft.Extensions.Options.IOptionsChangeTokenSource&lt;TOptions&gt;" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit ConfigurationChangeTokenSource`1&lt;TOptions&gt; extends System.Object implements class Microsoft.Extensions.Options.IOptionsChangeTokenSource`1&lt;!TOptions&gt;" />
   <TypeSignature Language="DocId" Value="T:Microsoft.Extensions.Options.ConfigurationChangeTokenSource`1" />
@@ -27,8 +27,7 @@
     </Interface>
   </Interfaces>
   <Docs>
-    <typeparam name="TOptions">
-    </typeparam>
+    <typeparam name="TOptions"></typeparam>
     <summary>Creates <see cref="T:Microsoft.Extensions.Primitives.IChangeToken" />s so that <see cref="T:Microsoft.Extensions.Options.IOptionsMonitor`1" /> gets
             notified when <see cref="T:Microsoft.Extensions.Configuration.IConfiguration" /> changes.</summary>
     <remarks>To be added.</remarks>
@@ -116,7 +115,7 @@
       <Parameters />
       <Docs>
         <summary>Returns the reloadToken from the <see cref="T:Microsoft.Extensions.Configuration.IConfiguration" />.</summary>
-        <returns />
+        <returns>Change token.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>