C# 10 is now available in .NET 6.0 Preview 5, is it possible to add support for C# 10 in LINQPad also?
This is now supported in the latest beta. Go to Edit | Preferences > Query and choose "Use Roslyn Daily build". After enabling, go to LINQPad's samples tab and expand the What's new in C# 10 node for a demo.
Let me know how you get along.