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

• C# 7.1 Pattern matching with generics
• C# 8.0 Recursive patterns
• C# 9.0 Relational patterns
• C# 9.0 not patterns
• C# 10.0 static abstract members in interfaces
• C# 11.0 switch on (ReadOnly)Span<char>

Contributions

• Add entry size info (@startewho, #3052)
• Add GC Info to R2R output (@eduardo-vp, #3076)
• Update R2R (@cshung, #3088)
• Reduce "unsafe" by replacing byte* pointer usage with ReadOnlySpan<byte> (@fowl2, #3106 )

Enhancements

• #3090: add support for the NUGET_PACKAGES environment variable
• Fixed some quirks in our search: #3064, #3065 and #3038

Performance

• #3075: Avoid processing already-transformed blocks by introducing BlockTransformContext.IndexOfFirstAlreadyTransformedInstruction, which allows us to track already transformed instructions after a block has been merged into another by ConditionDetection.
• #3075: Add NextSetBit operation to BitSet to avoid looking at every store bit individually in ReachingDefinitionsVisitor.GetStores()
• #3075: Fix ILVariableEqualityComparer.GetHashCode
• #3075: Improve performance of CSharpResolver.LookupSimpleNameOrTypeName in cases with a large number of local variables.
• #3075: Eliminate recursion in some parts of the decompiler engine
• ILSpy UI: #3057 - sub-optimal use of StringBuilder when constructing tree-node labels

Bug fixes

• #3061: Handler blocks of exception filter blocks do not have a header.
• #3103: unaligned.stobj cannot be transformed into inline assignment
• #3091: extension methods named Add were skipping some checks in AccessPathElement.IsMethodApplicable.
• #3004: MetadataModule.ResolveEntity() returning null for System.IntPtr when C# 11 native integers are enabled.
• #3105 - VS2017-2019 addin didn't properly match subdirectory structure of 2022 addin
• #3014: Missing type information in lambda expressions

And many other fixes, for a full list click here.