Getting “type or namespace name could not be found” but everything seems ok?

Question

I\'m getting a:

type or namespace name could not be found

error for a C# WPF app in VS2010. This area of code was compiling fine

Answer 1

I had same problem as discussed: VS 2017 underlines a class in referenced project as error but the solution builds ok and even intellisense works.

Here is how I managed to solve this issu:

1. Unload the referenced project
2. Open .proj file in VS ( i was looking for duplicates as someone suggested here)
3. Reload project again (I did not change or even save the proj file as I did not have any duplicates)