Visual Studios Error

Hey Guys,

I have some problems with Visual Studios 2012 Express.

I've coded a little 'thing' in C# and everytime when i want to convert my code into an .exe,
I receive this error:

Sorry if this question is stupid, but i'm a Newbie in C# / Visual Studios

Greets

Here's how to compile C#.
1. Code your application.
2. Debug the application.
3. Go to your C:\Users\Admin\Documents\Visual Studio 2010\Projects\ (that area) and find your applications folder.
4. Go into bin\Debug\ and take out your .exe file.