ComboBox.DoubleClick事件

先在窗口中加个Timer,

private void Form1_Load(object sender, System.EventArgs e)
        {
            this.timer1.Interval = SystemInformation.DoubleClickTime;

        }

private void timer1_Tick(object sender, System.EventArgs e)
        {
            this.timer1.Enabled = false;
        }

private void comboBox1_Click(object sender, System.EventArgs e)
        {
            if(this.timer1.Enabled)
            {
                MessageBox.Show("hell");
            }
            else
            {
                this.timer1.Start();
            }
        
        }