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Thread t;
private void button1_Click(object sender, EventArgs e)
{
if ((t == null) || (t.ThreadState != ThreadState.Running))
{
MessageBox.Show("Begin..");
t = new Thread(new ThreadStart(Method));
t.Start();
}
}
public void Method()
{
for (int i = 0; i < 1000000000; i++)
{
}
MessageBox.Show("Over..");
}
button.click()
{
button.Enabled=false
....
button.Enabled=true
}