C # Create threads three ways

1, the use of System.Timers.Timer to create a thread, while refreshing the interface display, the use of synchronizingobject properties, there is a card dead state.

System.Timers.Timer t = new System.Timers.Timer (); private void Button_Click (object sender, EventArgs e)
{
T.interval = 100;
t.elapsed + = new System.Timers.ElapsedEventHandler (t_elapsed);
T.enabled = true;
T.synchronizingobject = Label1;
}
void T_elapsed (object sender, System.Timers.ElapsedEventArgs e)
{
for (int i = 0; i < i++)
{
System.Threading.Thread.Sleep (50);
Label1. Text = i.ToString ();
}
t.enabled = false;
}

2, the use of ystem. Threading.thread Create a thread, refresh the interface, and the interface can be displayed in real time
private void Button1_Click (object sender, EventArgs e)
{
System.Threading.Thread th = new System.Threading.Thread (new System.Threading.ThreadStart (Run));
Th. Start ();
Label1. Text = "";
}
void Run ()
{
for (int i = 0; i < i++)
{
Call (i);
}
T.stop ();
}
delegate void Upcallback (int i);
void call (int i)
{
if (this. invokerequired)
{
Upcallback up = new Upcallback (call);
This. Invoke (UP, new object[] {i});
}
Else
{
System.Threading.Thread.Sleep (200);
Label1. Text = i.ToString ();
}
}

3, the use of System.Timers.Timer to create a thread, while refreshing the interface display, there is a card dead state.
private void Button2_Click (object sender, EventArgs e)
{
System.Timers.Timer Timer = new System.Timers.Timer ();
Timer. Enabled = true;
Timer. Elapsed + = new System.Timers.ElapsedEventHandler (timer_elapsed);
Timer. Interval = 5000;
}
void Timer_elapsed (object sender, System.Timers.ElapsedEventArgs e)
{
for (int i = 0; i < i++)
{
Call (i);
}
}
3, the use of System.Windows.Forms.Timer to create a thread, while refreshing the interface display, there is a card dead state.

private void Button3_Click (object sender, EventArgs e)
{
System.Windows.Forms.Timer tr = new System.Windows.Forms.Timer ();
Tr. Interval = 5000;
Tr. Tick + = new EventHandler (Tr_tick);
Tr. Start ();
}
void Tr_tick (object sender, EventArgs e)
{
for (int i = 0; i < i++)
{
Call (i);
}
}