//protected override void OnHandleDestroyed(EventArgs e)
//{
// DisposeContext();
// base.OnHandleDestroyed(e);
//}
internal protected virtual void OnInit()
{
_context.glClearColor(1.0f, 1.0f, 1.0f, 0.0f);
_context.glClearDepth(1.0f);
}