ایجاد یک فرم دایره ای شکل :
private void Form1_Load(object sender, EventArgs e)
{
this.Height = 350;
this.Width = 350;
//Creating circle path
System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();
path.AddEllipse(0, 0, 300, 300);
//Creating the region from the circle path
this.Region = new Region(path);
this.Show();
}