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Showing content from https://learn.microsoft.com/en-us/dotnet/api/system.threading.thread.sleep below:

Thread.Sleep Method (System.Threading) | Microsoft Learn

Source:

Thread.cs

Source:

Thread.cs

Source:

Thread.cs

Source:

Thread.cs

Suspends the current thread for the specified amount of time.

public:
 static void Sleep(TimeSpan timeout);

public static void Sleep(TimeSpan timeout);

static member Sleep : TimeSpan -> unit

Public Shared Sub Sleep (timeout As TimeSpan)

timeout

TimeSpan

The amount of time for which the thread is suspended. If the value of the timeout argument is Zero, the thread relinquishes the remainder of its time slice to any thread of equal priority that is ready to run. If there are no other threads of equal priority that are ready to run, execution of the current thread is not suspended.

The value of timeout is negative and is not equal to Infinite in milliseconds, or is greater than Int32.MaxValue milliseconds.

The following example uses the Sleep(TimeSpan) method overload to block the application's main thread five times, for two seconds each time.

using System;
using System.Threading;

class Example
{
    static void Main()
    {
        TimeSpan interval = new TimeSpan(0, 0, 2);

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

        Console.WriteLine("Main thread exits.");
    }
}

/* This example produces the following output:

Sleep for 2 seconds.
Sleep for 2 seconds.
Sleep for 2 seconds.
Sleep for 2 seconds.
Sleep for 2 seconds.
Main thread exits.
 */

open System
open System.Threading

let interval = TimeSpan(0, 0, 2)

for _ = 0 to 4 do
    printfn "Sleep for 2 seconds."
    Thread.Sleep interval

printfn "Main thread exits."

// This example produces the following output:
//     Sleep for 2 seconds.
//     Sleep for 2 seconds.
//     Sleep for 2 seconds.
//     Sleep for 2 seconds.
//     Sleep for 2 seconds.
//     Main thread exits.

Imports System.Threading

Class Example

    Shared Sub Main()

        Dim interval As New TimeSpan(0, 0, 2)

        For i As Integer = 0 To 4
            Console.WriteLine("Sleep for 2 seconds.")
            Thread.Sleep(interval)
        Next

        Console.WriteLine("Main thread exits.")
    End Sub
End Class

' This example produces the following output:
'
'Sleep for 2 seconds.
'Sleep for 2 seconds.
'Sleep for 2 seconds.
'Sleep for 2 seconds.
'Sleep for 2 seconds.
'Main thread exits.

The thread will not be scheduled for execution by the operating system for the amount of time specified. This method changes the state of the thread to include WaitSleepJoin.

You can specify Timeout.InfiniteTimeSpan for the timeout parameter to suspend the thread indefinitely. However, we recommend that you use other System.Threading classes such as Mutex, Monitor, EventWaitHandle, or Semaphore instead to synchronize threads or manage resources.

This overload of Sleep uses the total number of whole milliseconds in timeout. Fractional milliseconds are discarded.

This method does not perform standard COM and SendMessage pumping.

Note

If you need to sleep on a thread that has STAThreadAttribute, but you want to perform standard COM and SendMessage pumping, consider using one of the overloads of the Join method that specifies a timeout interval.

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