Using discards is not supported

[Happyrobot33]

Describe the bug in detail:
When you have a method that defines a out parameter, like MyCoolMethod(out string myString), then the normal way to call it if you don't want the value of the out, is to do this MyCoolMethod(out _). The issue is this does not work, and the compiler complains about a missing symbol _. Having this fixed would be nice, as otherwise right now you need to assign it to a random variable in your source and it looks a bit messy. The only current workaround is essentially MyCoolMethod(out string DISCARD)