Errors while building c# project

Question

Whenever I try to build my project, I get this error:

The "Output" task was not found. Check the following:

1. The name of the task in the project file is the same as the name of the task class.
2. The task class is "public" and implements the Microsoft.Build.Framework.ITask interface.
3. The task is correctly declared with in the project file, or in the *.tasks files located in the C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319 directory.

I'm using Visual Studio 2010 Professional. What can I do about this error?

Answer 1

Well I had this error what I did was restarted my computer and the error was gone

Hope this helps