`null propagating operator' cannot be used because it is not part of C# 4.0

[FZGames]

I updated 2D Toolkit to the latest version and now I get this error, repeatedly:

error CS1644: Feature `null propagating operator' cannot be used because it is not part of the C# 4.0 language specification

I have no idea what this is but I could do with this working...!

[colorbat]

Hi,

Scripting Runtime Version switch to .NET 4.x Equivalent, then the issue will be gone.

[FZGames]

Hey that worked great! Thanks very much!