winform异步释放大量子控件

 // 一次性获取子控件
 var controlsTemp = new List<Control>(flowLayoutPanel1.Controls.Cast<Control>());
 flowLayoutPanel1.Controls.Clear();
 // 然后统一释放资源                
 flowLayoutPanel1.BeginInvoke(new Action(() => {
     foreach (var ctrl in controlsTemp)
     {
         ctrl.Dispose();
     }
 }));