private int CreateShader(string shaderPath, ShaderType shaderType) { var shaderId = GL.CreateShader(shaderType); GL.ShaderSource(shaderId, ReadShaderSource(shaderPath)); GL.CompileShader(shaderId); var infoLogVert = GL.GetShaderInfoLog(shaderId); if (infoLogVert != System.String.Empty) { System.Console.WriteLine(infoLogVert); return(-1); } return(shaderId); }