winform 容器内存泄漏

循环中释放容器时调用Dispose()方法会销毁对象，导致容器的个数变化。

正确示例
//方法一
for (int i = this.flowLayoutPanel1.Controls.Count-1; i >=0; i--)
            {
                this.flowLayoutPanel1.Controls[i].Click -= btnClick;
                this.flowLayoutPanel1.Controls[i].Dispose();
            }

//方法二
int ctlNum = this.flowLayoutPanel1.Controls.Count;
            for (int i = 0; i < ctlNum; i++)
            {
                this.flowLayoutPanel1.Controls[0].Click -= btnClick;
                this.flowLayoutPanel1.Controls[0].Dispose();
            }

错误示例　　
     两种方式都因在循环中修改了循环条件，导致内存泄漏

　　　　　　  foreach (var ctl in this.flowLayoutPanel1.Controls)
            {
                (ctl as Control).Click -= btnClick;
                (ctl as Control).Dispose();
            }

 

            for (int i = 0; i < this.flowLayoutPanel1.Controls.Count; i++)
            {
                this.flowLayoutPanel1.Controls[i].Click -= btnClick;
                this.flowLayoutPanel1.Controls[i].Dispose();
            }