private void swapToolStripMenuItem_Click(object sender, EventArgs e) { int first = count + 1; int Second = count + 1; if (!string.IsNullOrWhiteSpace(xHolder.Text)) { first = int.Parse(xHolder.Text); } if (!string.IsNullOrWhiteSpace(yHolder.Text)) { Second = int.Parse(yHolder.Text); } if (first < this.MdiChildren.Length && Second < this.MdiChildren.Length) { ImageHolder temp = (ImageHolder)(this.MdiChildren[first]); temp.sendImageX(); ImageHolder temp2 = (ImageHolder)(this.MdiChildren[Second]); temp2.sendImageY(); temp.setBackgroundY(); temp2.setBackgroundX(); } }