Client.endConnection C# (CSharp) Method

    public void endConnection()
    {
        connectionEnded();
    }

 private void btnClose_Click(object sender, EventArgs e)
 {
     if (!Client.endConnection())
     {
         MessageBox.Show("关闭失败！！");
     }
     else
     {
         MessageBox.Show("连接成功关闭！！");
         this.btnClose.Enabled = false;
         this.btnBegin.Enabled = true;
     }
 }