add the System.Windows.Form redirect to the project, and then add the entry used:
using System.Windows.Forms;
and then add this to the Initialize method:
Form MyGameForm = (Form)Form.FromHandle(Window.Handle);
MyGameForm.FormBorderStyle = FormBorderStyle.None;
EDIT: mybee game with opacity
Form MyGameForm = (Form)Form.FromHandle(Window.Handle);
MyGameForm.Opacity = 0;
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