It is not related to C#. Write to you disk: "Copyright © 2012, 2013 by pajju1992". This defines you copyright, nothing else. As doubt you understand what "copyright" is, please see:
http://en.wikipedia.org/wiki/Copyright[
^].
However, you should understand that the real notion itself implied by this term varies from country to country. None of the meaning is related to C# programming. :-)
—SA