private void BtnSynchronize_Clicked(object sender, EventArgs e)
        {
            Thread t1 = new Thread((obj) => {
                try
                {
                    SynchronizeTelemarketer.SyncUpAsync();
                }
                catch (Exception)
                {
                    throw;
                }
            });


            Thread t2 = new Thread(() => {
                try
                {
                    SynchronizeTelemarketer.SyncDown();
                }
                catch { }
            });

            t1.Start();
            t2.Start();
        }
        public override void OnReceive(Context context, Intent intent)
        {
            Thread t1 = new Thread((obj) => {
                try
                {
                    SynchronizeTelemarketer.SyncUpAsync();
                }
                catch (Exception)
                {
                    throw;
                }
            });


            Thread t2 = new Thread(() => {
                try
                {
                    SynchronizeTelemarketer.SyncDown();
                }
                catch { }
            });

            t1.Start();
            t2.Start();
        }