[package] Update Microsoft.Windows.CsWin32 from 0.3.269 to 0.3.275

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Summary

Updates Microsoft.Windows.CsWin32 from 0.3.269 to 0.3.275 and fixes associated breaking changes and workarounds.

Version Change

eng/Versions.props: 0.3.269 → 0.3.275

CsWin32 0.3.275 Changelog

• Stream Request.Body is corrupted in Docker for Windows environment #1678: Fix cross-winmd STATUS_SUCCESS lookup
• .net core projects only support referencing .net framework assemblies in this release #1672: Promote handle pointer to an out reference if handle cannot be trivially represented as a SafeHandle
• System.TypeLoadException: Could not load type 'Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions' #1668: Bump metadata version
• Accessing build configuration such as Debug, Development and Release in scirpts in project.json #1621: Fix AppLocalAllowedLibraries handling in CsWin32RunAsBuildTask mode

Breaking Change Fixed: HttpCloseRequestQueue signature change

File: src/Servers/HttpSys/src/NativeInterop/RequestQueue.cs

CsWin32 0.3.275 changed PInvoke.HttpCloseRequestQueue to take HTTP_REQUEST_QUEUE_HANDLE (a struct) instead of SafeHandle (CsWin32 issue #1672). HttpCreateRequestQueue now returns HttpCloseRequestQueueSafeHandle (a SafeHandle subclass that calls HttpCloseRequestQueue in ReleaseHandle).

Fix: Replace the explicit PInvoke.HttpCloseRequestQueue(Handle) call with Handle.Dispose(). Since Handle is a HttpCloseRequestQueueSafeHandle, calling Dispose() correctly closes the queue handle (via ReleaseHandle) before the BoundHandle is disposed. The now-redundant Handle.SetHandleAsInvalid() call was also removed.

Workaround Removed: HTTP_REQUEST_PROPERTY.HttpRequestPropertyTlsCipherInfo enum cast

File: src/Servers/IIS/IIS/src/Core/IISHttpContext.cs

Previously a hardcoded integer cast was required because CsWin32 did not generate the HttpRequestPropertyTlsCipherInfo enum member:

// Before
(HTTP_REQUEST_PROPERTY)14 /* HTTP_REQUEST_PROPERTY.HttpRequestPropertyTlsCipherInfo */
// After
HTTP_REQUEST_PROPERTY.HttpRequestPropertyTlsCipherInfo

CsWin32 0.3.275 (via updated win32 metadata) now generates this member, so the cast workaround is no longer needed.

Build Output

Both affected projects build successfully with 0 warnings and 0 errors:

• Microsoft.AspNetCore.Server.HttpSys.csproj ✅
• Microsoft.AspNetCore.Server.IIS.csproj ✅

Remaining Workarounds (not yet removable)

Workaround	File	Reason
_sockaddr.sin6_addr.u.Byte.AsReadOnlySpan()	src/Shared/HttpSys/NativeInterop/SocketAddress.cs	CsWin32 issue #1086 closed as "not planned" — inline arrays not implemented; __byte_16 still lacks implicit ReadOnlySpan<byte> conversion
Manual SecPkgContext_CipherInfo struct	src/Shared/HttpSys/NativeInterop/SecPkgContext_CipherInfo.cs	CsWin32 can generate this struct, but migration would require namespace changes across shared source files used by both HttpSys and IIS

Generated by Update CsWin32 Package · sonnet46 6.5M · ◷