x86.frmMain.frmMain_FormClosing C# (CSharp) Method

        private void frmMain_FormClosing(object sender, FormClosingEventArgs e)
        {

            if (this._isClose)
            {
                try
                {
                    this.MainThread.Abort();
                }
                catch
                {
                }
                try
                {
                    this.MainThread2.Abort();
                }
                catch
                {
                }
                try
                {
                    this.MainThread3.Abort();
                }
                catch
                {
                }
                if (this._curTask.Stu != "" && this.rw_chk_Addtp.Checked)
                    this.postTask(0);
                loginForm.Close();
                e.Cancel = false;

            }
            else if (MessageBox.Show("确定要退出爱流量吗？退出后您的任务将暂停执行", "退出", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                TasksClass tasksClass = new TasksClass();
                if (sys.LoginUser.hyDj <= 8)
                {
                    string strsql = "update tasks8 set stu='暂停' where stu='等待中' and userid=" + (object)sys.LoginUser.ID;
                    tasksClass.exec(strsql);
                }
                try
                {
                    this.MainThread.Abort();
                }
                catch
                {
                }
                if (this._curTask.Stu != "" && this.rw_chk_Addtp.Checked)
                    this.postTask(0);
                loginForm.Close();
                e.Cancel = false;
            }
            else
            {
                new usersClass().updateLoginUserStu(DateTime.Now.ToString("yyyy-MM-dd HH:mm"), sys.LoginUser.ID);
                e.Cancel = true;

            }
        }