//Panel是没有这样的属性的，双击进去输入下面代码就可以更换边框颜色了
private void radPanel1_Paint(object sender, PaintEventArgs e) { Pen p = new Pen(Color.White); e.Graphics.DrawRectangle(p, 0, 0, this.radPanel1.Width - 1, this.radPanel1.Height - 1); }
原文：http://www.cnblogs.com/e-luther/p/5111799.html