Read up on bug fixes (PDB geneneration, language features) via the links provided to the respective releases.

[ILSpy 6.2 ](https://github.com/icsharpcode/ILSpy/releases/tag/v6.2)
* C# 7.0: Deconstruction
* C# 8.0: `await foreach`
* C# 8.0: Disposable `ref struct`s
* C# 8.0: Enhanced `using` statements
* C# 8.0: `switch` expressions
* C# 9.0: `init` accessors
* C# 9.0: function pointers (see #2150)
* C# 9.0: foreach with GetEnumerator extension methods
* C# 9.0: Lambda parameter discards

[ILSpy 7.0](https://github.com/icsharpcode/ILSpy/releases/tag/v7.0)
* C# 9.0: record classes
* C# 9.0: with expressions
* C# 9.0: primary constructors
* Support for .NET 5 custom calling conventions
* Improved support for Unsafe-intrinsics

[ILSpy 7.1 ](https://github.com/icsharpcode/ILSpy/releases/tag/v7.1)
* Adjusted pattern detection for Roslyn 3.10