This release is based on .NET 10.0. Please make sure that you have it installed on your machine beforehand.

Note for Mac users: see https://github.com/icsharpcode/ILSpy/wiki/Build-Artifacts#running-the-macos-artifact because the ILSpy.app is neither signed nor notarized.

Avalonia Cross Platform Port

• PR #3755: Avalonia 12 Port and Removal of the WPF UI
• PR #3759: Metadata explorer cleanup, flags-filter fixes, and WPF row-details parity
• PR #3766: Round-trip the legacy WPF SessionSettings shape
• PR #3768: Build, test, and package ILSpy on Linux and macOS in CI
• PR #3861: Show text-based resources inline with syntax highlighting
• PR #3875: Avalonia 12.1
• PR #3876: Keep BAML decompilation working when WPF assemblies are missing

New Features

• PR #3847: Unpack !AvaloniaResources into per-file resource tree nodes
• PR #3801: Fix #3797: resolve ilspycmd -t type names with fuzzy matching
• PR #3789: Add a bookmarks feature for the decompiled C# view
• PR #3786: Add omnibar breadcrumb and search bar above the decompiled code
• PR #3769: Make the override modifier a link to the overridden member
• PR #3762: Add Open from NuGet feed dialog for browsing and opening packages

User Interface

• PR #3857: Fix #2078: Generic local functions not highlighted properly
• PR #3855: Fix #3845: Add option to expand XML documentation comments
• PR #3814: Toggle the fold under the right-click, not at the caret
• PR #3812: Syntax-colour analyzer signatures with bold type names (#2164)

Enhancements

• PR #3872: Decompile await on dynamic expressions
• PR #3837: Fix #3804: decompile foreach over inline array
• PR #3791: Fix #3777: decompile runtime async without a separate C# 15 setting
• PR #3843: Bound XamarinCompressedFileLoader against crafted XALZ headers
• PR #3842: Bound WebCilFile section access against mapped-view length
• PR #3841: Harden BAML reader against crafted-resource crashes
• PR #3816: Allow overriding an assembly's target framework for reference resolution
• PR #3840: Bound .rsrc resource-tree parsing against crafted input
• PR #3838: Guard against OOB read when bundle signature is at file start
• PR #3818: Display the IL 'tail.' prefix in C# output
• PR #3808: Migrate the VS extension to an SDK-style VSIX (dotnet build) and retire the VS2017/2019 add-in
• PR #3802: Fix #3799 and three related stackalloc initializer decompilation defects
• PR #3780: Compute public-key tokens with a managed SHA-1

Documentation

• PR #3868: CONTRIBUTING.md for the AI era
• PR #3870: Add decompiler architecture document

Testing / Infrastructure

• PR #3771: Run the decompiler test suite on Linux
• PR #3788: Use cross-platform separators for the FSharp.Core.dll test path
• PR #3807: Adopt SDK default Compile items in Decompiler and Decompiler.Tests
• PR #3815: Verify generated PDBs against the compiler's breakpoint map (PdbGen fixtures previously passed vacuously)
• PR #3836: Don't assert decompiled local types match the signature
• PR #3839: Add fine-grained debug steps with highlighting for C# and ILAst
• PR #3849: Set OpenSSL SHA1 flag in build scripts
• PR #3859: Add test coverage for untested corners of implemented language features
• PR #3874: Upload TestCases folder as artifact when CI tests fail

Contributions

• PR #3851: Fix #3850: recover ReadOnlySpan array literals from the legacy lazy cache — @sailro, thank you!
• PR #3878: Handle negative dictionary capacity in string switch transform — @ds5678, thank you!
• PR #3828: Fix #3826: wrap an overflowing constant subexpression in unchecked() — @sailro, thank you!
• PR #3831: Fix #3825: reconstruct async iterators with [EnumeratorCancellation] and await in finally — @sailro, thank you!
• PR #3830: Fix #3827: keep the while-loop for a ref local used after the loop (avoid an uninitialized hoisted ref decl) — @sailro, thank you!
• PR #3823: Fix #3821: keep ref-struct conditional as if/return, not ?. / ?? (CS8978) — @sailro, thank you!
• PR #3822: Fix #3820: decompile dynamic ~ as ~x instead of an unsupported-opcode error — @sailro, thank you!
• PR #3796: Fix decompiler tests project inside VS — @DoctorKrolic, thank you!
• PR #3787: dev: fix editorconfig parsing on some editors — @mochaaP, thank you!
• PR #3879: Fix the "Use nested namespace structure" option — @ds5678, thank you!

Bug Fixes

• PR #3881: Reject negative char index in the length-and-char string switch
• PR #3866: Fix #3475: Emit 'true ? null : new { ... }' for null of anonymous type
• PR #3864: Fix #3860: Avoid 'out var' if the variable recurs in the argument list
• PR #3873: Fix dynamic event-assignment decompilation leaking is-event opcode
• PR #3863: Simplify hoisted null-guard fold to reference-type constructor chains
• PR #3852: Fix #3824: fold a hoisted argument null-guard at the ILAst level
• PR #3832: Fix #3754: omit async stepping info for runtime-async methods
• PR #3806: Fix Export NullReferenceException for images/resourcexsd.baml
• PR #3792: Fix #3774: keep field initializers when decompiling a static ctor alone
• PR #3790: Skip missing session assemblies when navigating on launch
• PR #3776: Escape reserved Windows device names in output file names

For a full list of changes click here.