Thanks for a lot of working of OpenTK .
I have been learning the OpenGL for few months .
And recently, I could reach the step using some shaders .
I met a small? bug .
I'm developing a project which uses shader .
So, I need to use "GL.ShaderSource" .
I wrote shaders and debug a project .
Then program crashes on GL.ShaderSource line .
Error message is "COM Exception" .
I think about root of the crash .
Tried removing Japanese comment line from shader code , the crash disappered .
Maybe, 2byte character code is root of this bug .
I'm sorry this poor English . Thank you .