摘要：
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.Linq; ... 阅读全文
摘要：
1 public partial class CirclePictureBox : PictureBox 2 { 3 public CirclePictureBox() 4 { 5 Circle = true; 6 ... 阅读全文