在winform窗体上拖一个flowLayoutPane，一个Button,项目中再创建一个用户控件UcControl,用户控件上放几十个子控件

private void button1_Click(object sender, EventArgs e)        {            try            {                DateTime startTime = DateTime.Now;                flowLayoutPanel1.Controls.Clear();                for (int i = 0; i < Controlcount; i++)                {                    UcControl v = new UcControl();                    v.Width = 275;                    v.Height = 120;                    flowLayoutPanel1.Controls.Add(v);                }                slExecutedTime.Text = (DateTime.Now - startTime).ToString();            }            catch (Exception exception)            {                Console.WriteLine(exception);                throw;            }        }

使劲点按钮，过一会弹出创建句柄出错。解决办法，加上红色部分就好了，再使劲点也不会出问题。

private void button1_Click(object sender, EventArgs e)        {            try            {                DateTime startTime = DateTime.Now;                DeleteChilds(flowLayoutPanel1);                flowLayoutPanel1.Controls.Clear();                for (int i = 0; i < Controlcount; i++)                {                    UcControl v = new UcControl();                    v.Width = 275;                    v.Height = 120;                    flowLayoutPanel1.Controls.Add(v);                }                slExecutedTime.Text = (DateTime.Now - startTime).ToString();            }            catch (Exception exception)            {                Console.WriteLine(exception);                throw;            }        }

private void DeleteChilds(Control control)        {            while (control.Controls.Count > 0)            {                if (control.Controls[0] != null)                {                    //DeleteChilds(control.Controls[0]);                    control.Controls[0].Dispose();                }                            }                }