Solution:

using System.Threading;

// on button click , procedure for starting thread

private void button2_Click(object sender, EventArgs e)

{

// create thread with passing function name in constructor

Thread t = new Thread(new ThreadStart(called));

//start the thread

t.Start();

}

protected void called()

{

int i=0;

// infinite loop

while(i>=0)

{

Console.WriteLine(i);

i = i + 1;

}

}