1  private Color _BorderColor = Color.Black;
 2 
 3         [Browsable(true), Description("边框颜色"), Category("自定义分组")]
 4         public Color BorderColor
 5         {
 6             get { return _BorderColor; }
 7             set
 8             {
 9                 _BorderColor = value;
10                 this.Invalidate();
11             }
12         }
13 
14         private int _BorderSize = 1;
15 
16         [Browsable(true), Description("边框粗细"), Category("自定义分组")]
17         public int BorderSize
18         {
19             get { return _BorderSize; }
20             set 
21             { 
22                 _BorderSize = value;
23                 this.Invalidate();
24             }
25         }

 1         /// 

 2         /// 重写OnPaint方法
 3         /// 
 4         /// 
 5         protected override void OnPaint(PaintEventArgs e)
 6         {
 7             ControlPaint.DrawBorder(e.Graphics,
 8                             this.ClientRectangle,
 9                             this._BorderColor,
10                             this._BorderSize,
11                             ButtonBorderStyle.Solid,
12                             this._BorderColor,
13                             this._BorderSize,
14                             ButtonBorderStyle.Solid,
15                            this._BorderColor,
16                             this._BorderSize,
17                             ButtonBorderStyle.Solid,
18                             this._BorderColor,
19                             this._BorderSize,
20                             ButtonBorderStyle.Solid);
21         }