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Bump ICSharpCode.Decompiler from 8.0.0.7345 to 11.1.0.9782 - #736
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--- updated-dependencies: - dependency-name: ICSharpCode.Decompiler dependency-version: 11.1.0.9782 dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com>
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Pinned ICSharpCode.Decompiler at 11.1.0.9782.
Release notes
Sourced from ICSharpCode.Decompiler's releases.
11.1
A major focus of this release was to find the small (and not so small) bugs of the decompiler via a revamp of our testing by adding two new tools that allow mass-testing (for more information see
TestTools/README.md):nugetfuzz: downloads packages from nuget.org and runs them through a DEBUG build ofilspycmd(sanity checks/assertions enabled). It records: crash, assertion fail, warnings in the decompiler output (as comment "IL_<nnnn>: ...") as well as any residue of compiler-generated identifiers in C# code (hints at missing language feature/pattern support).decompdiff: runs an assembly through two different versions of the decompiler (driven viailspycmd) and calculates a diff of the generated source code.You should see better decompilation results as an effect of this push and the general push of fixing previously reported decompiler bugs by users.
New Language Features
User Interface
Contributions
Performance
Enhancements
... (truncated)
11.0
The major news item of this release cycle is us porting ILSpy from WPF to Avalonia. With this port, ILSpy is now available on Linux and Mac in addition to Windows. Do note that there is no longer a WPF frontend, it was entirely removed in favor of the new Avalonia one.
Aside from this already major UI work, a few other long-standing UI features from our wish list made it into ILSpy:
A second focus area was improving the ilspycmd story for agentic development. Download numbers for our dotnet tool took off in the last quarter of 2025, and agents like Claude are the reason for that (downloads are now exceeding 70k/week). Given we are using Claude as well, we found a few areas lacking that needed improvement, especially to save on token spend:
Together with list/extract embedded resources, decompile BAML to XAML which shipped in 10.1, we now have a good set of optimized options for the most common scenarios in skills and tool calling available for you.
A part of this initiative was hardening:
The third pillar of this release is fixing long-standing annoyances and in general investing in tech debt, eg fuzzing our decompiler engine with NuGet packages. A lot (!) of the changes detailled in the release notes for preview 1 and rc deal with exactly those many small to big improvements.
Finally, we'd like to point out one retirement: the VS2017/2019 add-in has been removed, we continue to support VS2022-2026.
What is new since RC?
For a full list of changes click here.
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.
11.0-rc
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.
New Features
User Interface
Enhancements
Testing / Infrastructure
Contributions
IProjectFileWriterimplementations — @ds5678, thank you!Bug Fixes
... (truncated)
11.0-preview1
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
New Features
User Interface
Enhancements
... (truncated)
10.1.1
This release is based on .NET 10.0. Please make sure that you have it installed on your machine beforehand.
Bug Fixes
10.1
This release is based on .NET 10.0. Please make sure that you have it installed on your machine beforehand.
New Language Features
Enhancements
Bug fixes
For a full list of changes click here.
10.0.1
This release is based on .NET 10.0. Please make sure that you have it installed on your machine beforehand.
Bug fixes
Enhancements
For a full list of changes click here.
10.0
This release is based on .NET 10.0. Please make sure that you have it installed on your machine beforehand.
New Language Features
allows ref structconstraintextensionmembersInlineArraysUser Interface
Enhancements
CSharpConversions: General improvements, fixing various missing rules for C# up to version 9.ckfiniteIL opcode in decompilerWholeProjectDecompiler.CreateDecompilerprotected virtual to make the decompilation pipeline extensible.Contributions
TargetFrameworkandTargetServicesAPIs are now public (see #3501 by @nikitalita)inerroneously being applied tothis(see #3682 by @nikitalita)allows ref structconstraint (see #3537 by @jjonescz)IDecompilerTypeSystemrather than aDecompilerTypeSystemtoCSharpDecompiler(see #3529 by @lordmilko)DecompilerSettings.ExpandParamsArguments(see #3534 by @MSchmoecker)DecompilerSettings.AlwaysMoveInitializer: Always move initializer from static constructor to field initializer (see #3540 by @miloush)... (truncated)
10.0-preview3
This preview release is based on .NET 10.0. Please make sure that you have it installed on your machine beforehand.
Enhancements
Contributions
inerroneously being applied tothis(see #3682 by @nikitalita)Bug Fixes
For a full list of changes click here.
10.0-preview2
This preview release is based on .NET 10.0. Please make sure that you have it installed on your machine beforehand.
New Language Features
allows ref structconstraintextensionmembersEnhancements
CSharpConversions: General improvements, fixing various missing rules for C# up to version 9.ckfiniteIL opcode in decompilerUser Interface
Contributions
allows ref structconstraint (see #3537 by @jjonescz)IDecompilerTypeSystemrather than aDecompilerTypeSystemtoCSharpDecompiler(see #3529 by @lordmilko)DecompilerSettings.ExpandParamsArguments(see #3534 by @MSchmoecker)DecompilerSettings.AlwaysMoveInitializer: Always move initializer from static constructor to field initializer (see #3540 by @miloush)API Clean-up
UnresolvedUsingScopeResolvedUsingScopetoUsingScopeToTypeReference... (truncated)
10.0-preview1
This preview release is based on preview 6 of .NET 10.0. Please make sure that you have it installed on your machine beforehand.
New Language Features
InlineArraysEnhancements
WholeProjectDecompiler.CreateDecompilerprotected virtual to make the decompilation pipeline extensible.Contributions
Activator.CreateInstance<T>()tonew T()(see #3497 by @DoctorKrolic)TargetFrameworkandTargetServicesAPIs are now public (see #3501 by @nikitalita)flag(NUM)toflags(NUM)(see #3473 by @hez2010)Performance
Bug fixes
RuntimeHelpers.InitializeArrayis malformed.And many other fixes, for a full list click here.
ICSharpCode.Decompiler Assembly Changes (API diff)
Changed Types
ICSharpCode.Decompiler.DecompilerSettings
Clone() : DecompilerSettingsParamsCollections : boolUseObjectCreationOfGenericTypeParameter : boolInlineArrays : boolCheckForOverflowUnderflow : boolClone() : DecompilerSettings... (truncated)
9.1
ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0.x or later must be installed prior to starting ILSpy. Note that ILSpy 9.1 also allows a later runtime via #3391.
New Language Features
Enhancements
Contributions
RuntimeHelpers.CreateSpan<T>(see #3380 by @ds5678)Bug fixes
And many other fixes, for a full list click here.
9.0
ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0.x or later must be installed prior to starting ILSpy.
Generic themes of this release were refactoring the old WPF code base and moving away from platform-dependent implementations to make reuse easier via our ILSpyX package.
A few notable picks from the "What's new" department for you to check out: WebCIL and standalone ECMA-335 metadata support, as well as diagramming (either via ilspycmd or assembly context menu). And in general quality-of-life improvements like the ability to disable automatic assembly loading, performance improvements via DATAS and future-proofing for .NET 10.
New Language Features
(ReadOnly)Span<char>using a compiler-generated hash function.a.GetValueOrDefault(b) -> a ?? btransform for side-effect-free default values.Enhancements
ExportAnalyzerAttribute(see #3239)readonly.ldelemanewobj,initobjandcallinstructions inTypeInstantiatedByAnalyzerContributions
Mono C# compiler 2.6.4pinned region with array variable (#3110, @ElektroKill)DynamicLocalVariableandDefaultNamespacecustom debug information (#3111, @ElektroKill)DetermineEffectiveAccessibility(#3164, @yzdeveloper)... (truncated)
9.0-rc
ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0 or later must be installed prior to starting ILSpy.
New Language Features
Contributions
Enhancements
Performance
DockWorkspace.InitializeLayout()instead of the property getter to avoid WPF seeing them inInitializeComponent()and rendering all panes docked at the right before the layout is properly initialized.Bug fixes
And many other fixes, for a full list click here.
9.0-preview3
ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0 must be installed prior to starting ILSpy.
Breaking Changes in
ICSharpCode.DecompilerIsRef,IsOutandIsInflags fromIParameterParameterModifierswithReferenceKind.New Language Features
Contributions
Enhancements
ExportAnalyzerAttribute(see #3239)readonly.ldelemanewobj,initobjandcallinstructions inTypeInstantiatedByAnalyzerBug fixes
GetEnumerator(), collection initializer ->Add()and deconstruction ->Deconstruct().And many other fixes, for a full list click here.
9.0-preview2
ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0 or later must be installed prior to starting ILSpy.
Breaking Changes
@filesupport with breaking changes to command line options #3205Enhancements
Bug fixes
9.0-preview1
ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0 or later must be installed prior to starting ILSpy.
Breaking Changes
MetadataFilebase class forPEFileIModule.PEFileis now namedIModule.MetadataFileIFileLoaderAPI to allow for easier extensibility of supported file formats (see #3191)IProjectFileWriterandIProjectInfoProviderAPIs are now public (see #3151 and #3191)Performance
New Language Features
(ReadOnly)Span<char>using a compiler-generated hash function.a.GetValueOrDefault(b) -> a ?? btransform for side-effect-free default values.Enhancements
Contributions
DynamicLocalVariableandDefaultNamespacecustom debug information (#3111, @ElektroKill)DetermineEffectiveAccessibility(#3164, @yzdeveloper)Mono C# compiler 2.6.4pinned region with array variable (#3110, @ElektroKill)Bug fixes
UnknownType: Ensuring that the FullName of nested unknown types contains the outer type name(s), not just the namespace and nested type name.And many other fixes, for a full list click here.
8.2
ILSpy 8.x is based on .NET 6.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 6.0.2 or later must be installed prior to starting ILSpy.
New Language Features
notpatterns(ReadOnly)Span<char>Contributions
Enhancements
NUGET_PACKAGESenvironment variablePerformance
BlockTransformContext.IndexOfFirstAlreadyTransformedInstruction, which allows us to track already transformed instructions after a block has been merged into another byConditionDetection.NextSetBitoperation toBitSetto avoid looking at every store bit individually inReachingDefinitionsVisitor.GetStores()ILVariableEqualityComparer.GetHashCodeCSharpResolver.LookupSimpleNameOrTypeNamein cases with a large number of local variables.StringBuilderwhen constructing tree-node labelsBug fixes
Addwere skipping some checks inAccessPathElement.IsMethodApplicable.And many other fixes, for a full list click here.
8.1.1
Release notes for 8.1 apply https://github.com/icsharpcode/ILSpy/releases/tag/v8.1 as this release is a bugfix release only.
Fixed bug #3069 in switch-on-string detection, where complex switches compiled with newer versions of the C# compiler would cause a crash. Other minor fixes included too.
For details please see icsharpcode/ILSpy@v8.1...v8.1.1
8.1
ILSpy 8.x is based on .NET 6.0 compared to .NET Framework 4.7.2 for the previous generations of ILSpy. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 6.0.2 must be installed prior to starting ILSpy.
New Language Features
Contributions
Enhancements
Bug fixes
And many other fixes, for a full list click here.
Commits viewable in compare view.