public void Create(string vertexPath, string fragmentPath)
{
if (_handle >= 0)
{
throw new InvalidOperationException("Shader is already loaded");
}
var vertexShader = CreateShader(vertexPath, ShaderType.VertexShader);
var fragmentShader = CreateShader(fragmentPath, ShaderType.FragmentShader);
_handle = GL.CreateProgram();
GL.AttachShader(_handle, vertexShader);
GL.AttachShader(_handle, fragmentShader);
GL.LinkProgram(_handle);
GL.DetachShader(_handle, vertexShader);
GL.DetachShader(_handle, fragmentShader);
GL.DeleteShader(vertexShader);
GL.DeleteShader(fragmentShader);
}