void RectangleToolStripMenuItem_Click(object sender, EventArgs e) { AddRectangleForm arf = new AddRectangleForm(); if (arf.ShowDialog() == DialogResult.OK) { int a = arf.Result.X; int b = arf.Result.Y; while (a < arf.Width) { Image.Points.Add(new XPoint(a, b, Pens.Black)); a++; } while (b < arf.Height) { Image.Points.Add(new XPoint(a, b, Pens.Black)); b++; } a = arf.Result.X; b = arf.Result.Y; while (b < arf.Height) { Image.Points.Add(new XPoint(a, b, Pens.Black)); b++; } while (a < arf.Width) { Image.Points.Add(new XPoint(a, b, Pens.Black)); a++; } } xImageControl1.LoadImage(Image); }