Asp.net controls are not accessible in code behind

Question

I have a project that was previously built by someone else. When I try to add a new control to the page, I can\'t access it in the code behind. When I try to access it there

Answer 1

Problem is you might have multiple aspx files with codefile in page directive points to same codebehind file. It expects the same control to exists in all the aspx file linked to same code behind and thus throwing compilation error.

If you still having the issue cleaning up the same as mentioned above, check the designer page and regenerate one.