Cannt find SharpGL.Control Tool

[Wilfried199754]

Hi，I was using SharpGL at Winform，with .Net Framework 4.5.2 , SharpGL 3.1.1，SharpGL.Winforms 3.1.1 and SharpGL.Serialization3.1.1.Now I face some problems which I cannt fix them.When I using SharpGL.Winforms.dll,I
cannt find SharpGLControl Tool at designer,there only has GLColorPicker Tool.But when I using wpf and SharpGL.WPF,it works good.
So did I do something worry and how can I fix them？