C# error in Grasshopper

i have got a problem with C# IntelliSense. The all c# script written in the past were working, and now without any reason gives nonsense problems and red and not working at all. Any suggestion ?

There was a horrible bug at some point to do with the custom using statements. It has been fixed though. What version are you running?

But you’ll have to at least tell us what the error message says. They all have the exact same red colour from where I’m sitting.

I downloaded rhino 6, updated grasshopper and also dowloaded new version of .NetFramework. Now it works, i still dont know which one was the problem.

thank you.