Text editor in C#?

Hello,


I'm looking for source codes of Text Editor written in C#.





I tried to make one but I stucked when I want to open file into richTextBox, I can open txt, I can open rtf, but when i try to open for example cs file it throws excepion "file format is not valid" instead openig it as a plain text.


I also don't know how to use widows clipboard.





Could anybody help me please?


Thank you in advance.


Regards,


M. Prokop

Text editor in C#?
you can try codeprojects.com , a lot of c# projects are there for free.