I'm using VS 2015 (professional), but it was getting really slow when opening the .cs files. I tried some guides, the last one said deleting all files from C:\Users*****\AppData\Local\Microsoft\VisualStudio\14.0

Now, I have a lot of errors in code. I think I was installed something about roslyn because all the c# 6.0 features, like "TryGetValue(soemvalue, out var value) are not working.

Can you help me?

EDIT: After 5 minutes the errors gone (I have the Microsofts compilers nuget installed), but everytime I close and reopen VS the errors appears.