程序代码：

delegate void SafeRefreshCallback();

private void SafeRefresh()
{
    if (this.InvokeRequired)
    {
        SafeRefreshCallback d = new SafeRefreshCallback(SafeRefresh);
        if (!this.Disposing)
        {
             try
            {
                this.Invoke(d);
            }
            catch { };
        }
    }
    else
    {
        this.Refresh();
    }
}