@TheFamousRat The error is in his title:
"Random does not contain a definition for 'RandRange'". I think you're following the example for
RandomNumberGenerator in the documentation which says that
RandRange() is the C# equivalent of
rand_range() in gdscript. I'm seeing the same error, and I was able to fix the problem by doing
GD.RandRange(...), omitting the
Random variable name entirely.