Update .NET 10 overview page for Preview 6

docs/core/whats-new/dotnet-10/overview.md

@@ -2,44 +2,48 @@
 title: What's new in .NET 10
 description: Learn about the new features introduced in .NET 10 for the runtime, libraries, and SDK. Also find links to what's new in other areas, such as ASP.NET Core.
 titleSuffix: ""
-ms.date: 06/09/2025
+ms.date: 07/16/2025
 ms.topic: whats-new
 ai-usage: ai-assisted
 ---
 
 # What's new in .NET 10
 
-Learn about the new features in .NET 10 and find links to further documentation. This page is updated for Preview 5.
+Learn about the new features in .NET 10 and find links to further documentation. This page is updated for Preview 6.
 
 .NET 10, the successor to [.NET 9](../dotnet-9/overview.md), is [supported for three years](https://dotnet.microsoft.com/platform/support/policy/dotnet-core) as a long-term support (LTS) release. You can [download .NET 10 here](https://get.dot.net/10).
 
 Your feedback is important and appreciated. If you have questions or comments, use the discussion on [GitHub](https://github.com/dotnet/core/discussions/categories/news).
 
 ## .NET runtime
 
-The .NET 10 runtime introduces improvements in JIT inlining, method devirtualization, and stack allocations. It also includes AVX10.2 support and NativeAOT enhancements.
+The .NET 10 runtime introduces improvements in JIT inlining, method devirtualization, and stack allocations. It also includes AVX10.2 support and NativeAOT enhancements. Preview 6 adds improved code generation for struct arguments and enhanced loop inversion for better optimization.
 
 For more information, see [What's new in the .NET 10 runtime](runtime.md).
 
 ## .NET libraries
 
-The .NET 10 libraries introduce new APIs in cryptography, globalization, numerics, serialization, collections, and diagnostics, and when working with ZIP files.
+The .NET 10 libraries introduce new APIs in cryptography, globalization, numerics, serialization, collections, and diagnostics, and when working with ZIP files. New JSON serialization options include disallowing duplicate properties and strict serialization settings. Post-quantum cryptography support has been expanded with Windows CNG support.
 
 For more information, see [What's new in the .NET 10 libraries](libraries.md).
 
+For details on JSON serialization, see [System.Text.Json overview](/dotnet/standard/serialization/system-text-json/overview).
+
 ## .NET SDK
 
-The .NET 10 SDK includes support for Microsoft.Testing.Platform in `dotnet test`, standardizes CLI command order, and updates the CLI to generate native tab-completion scripts for popular shells. For containers, console apps can natively create container images, and a new property lets you explicitly set the format of container images.
+The .NET 10 SDK includes support for Microsoft.Testing.Platform in `dotnet test`, standardizes CLI command order, and updates the CLI to generate native tab-completion scripts for popular shells. For containers, console apps can natively create container images, and a new property lets you explicitly set the format of container images. New in Preview 6: platform-specific .NET tools, one-shot tool execution with `dotnet tool exec`, the new `dnx` tool execution script, CLI introspection with `--cli-schema`, and enhanced file-based apps with publish support and native AOT.
 
 For more information, see [What's new in the SDK for .NET 10](sdk.md).
 
+For details on .NET tools, see [Manage .NET tools](/dotnet/core/tools/global-tools).
+
 ## .NET Aspire
 
 For information about what's new in .NET Aspire, see [.NET Aspire — what's new?](/dotnet/aspire/whats-new/).
 
 ## ASP.NET Core
 
-The ASP.NET Core 10.0 release introduces several new features and enhancements, including Blazor improvements, OpenAPI enhancements, and minimal API updates.
+The ASP.NET Core 10.0 release introduces several new features and enhancements, including Blazor improvements, OpenAPI enhancements, and minimal API updates. Preview 6 adds Blazor WebAssembly preloading, automatic memory pool eviction, enhanced form validation, improved diagnostics, and passkey support for Identity.
 
 For details, see [What's new in ASP.NET Core for .NET 10](/aspnet/core/release-notes/aspnetcore-10.0).
 
@@ -88,13 +92,13 @@ These updates ensure that Visual Basic can consume updated features in C# and th
 
 ## .NET MAUI
 
-The .NET MAUI updates in .NET 10 include several new features and quality improvements for .NET MAUI, .NET for Android, and .NET for iOS, Mac Catalyst, macOS, and tvOS.
+The .NET MAUI updates in .NET 10 include several new features and quality improvements for .NET MAUI, .NET for Android, and .NET for iOS, Mac Catalyst, macOS, and tvOS. Preview 6 adds MediaPicker enhancements for selecting multiple files and image compression, WebView request interception, and support for Android API levels 35 and 36.
 
 For details, see [What's new in .NET MAUI in .NET 10](/dotnet/maui/whats-new/dotnet-10).
 
 ## EF Core
 
-The EF Core 10 release introduces several new features and improvements, including LINQ enhancements, performance optimizations, and improved support for Azure Cosmos DB.
+The EF Core 10 release introduces several new features and improvements, including LINQ enhancements, performance optimizations, and improved support for Azure Cosmos DB. Preview 6 adds named query filters, allowing multiple filters per entity type with selective disabling.
 
 For details, see [What's new in EF Core for .NET 10](/ef/core/what-is-new/ef-core-10.0/whatsnew).