New Language Features

• C# 7.0 Local functions (#1586)
• C# 7.0 Throw expressions (#1600)

New Features

• Decompile a set of assemblies to a solution (#1550 by @dymanoid)

Improvements & Bugfixes

• C# 8.0 nullable reference types metadata was updated to the latest format. Note that this is a breaking change and assemblies generated by older preview versions of C# 8 are no longer supported.
• Improved decompilation of ref typed expressions, in particular ref/in extension methods and in parameters.
• Improved support for Mono yield return state machines and closure types.
• Improved stability of decompiler and disassembler on invalid metadata tokens.
• Many minor bug and stability fixes. For a complete list of all changes since preview3 see here.

UI Improvements

• Improved linking in the decompiler view:
  • method group / delegate references
  • the constructor of an attribute is reachable, by clicking on the open/close parenthesis.
• Added matching bracket highlighting
• Updated to AvalonEdit 6.0 Preview

Known issues & limitations

• C# 8.0 nullable reference types metadata was updated to the latest format. Note that this is a breaking change and assemblies generated by older preview versions of C# 8 are no longer supported. (See #1619 (comment))
• Generic local functions are not yet supported (#1588)
• "Open assembly from GAC" may require administrator privileges (#1498)
• Matching bracket highlighting does not yet support all language features that introduce new syntax.