Answer:   Use Thread.Sleep method.

Example -

static void Main()
{
for (int i = 0; i < 5; i++)
{
Console.WriteLine("Sleep for 2 seconds.");
Thread.Sleep(2000);
}
}

Answer:   By using Thread.sleep(), we can send a thread to sleep according to the given time. Sleep () method can be blocked the current thread for the specified number of milliseconds. In other words We can include specific time via thread.sleep() method as follows.
Thread.Sleep (TimeSpan.FromHours (1)); // sleep for 1 hour
Thread.Sleep (1000); // sleep for 1000