Standalone decompiler can be downloaded directly here, the VS2017 addin and decompiler NuGet are available at the respective locations.

New Language Features

• C# 7.2 private protected (contributed)
• C# 7.2 conditional ref
• C# 7.1 async Main (contributed)
• C# 7.0 out variables
• C# 7.0 ref returns and locals
• C# 6.0 string interpolation
• C# 6.0 await in catch / finally
• C# 6.0 expression-bodied members
• C# 6.0 null propagator (null-conditional operator, succinct null checking)

Improved Mono mcs Codegen (following areas)

• switch
• lock
• foreach
• LINQ
• Delegate construction

Test Infrastructure Improvements

• Support for mcs
• Support for vbc

Improvements in TypeSystem

• Lazy-loading for nested types
• Add metadata tokens to type system
• Remove dead code

Misc

• UI: Switch to VS MEF (contributed)
• General/UI: Language version selection
• VSIX: drop VS 2015 support
• Updated pattern detection for changes in Roslyn 2.7
• Refactored ILSpy.AddIn

Bug Fixes for Roslyn

• dotnet/roslyn#25251 (Decompilation should simplify "type" usage)
• dotnet/roslyn#25246 (Decompilation cannot decompile xUnit's Assert.All)
• #1095 (C# decompilation, for flags enums always use hex prefix)