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Thread.Sleep Method (Int32)

Suspends the current thread for the specified number of milliseconds.

Namespace:  System.Threading
Assembly:  mscorlib (in mscorlib.dll)

public static void Sleep(
	int millisecondsTimeout
)

Parameters

millisecondsTimeout
Type: System.Int32

The number of milliseconds for which the thread is suspended. If the value of the millisecondsTimeout 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.

ExceptionCondition
ArgumentOutOfRangeException

The time-out value is negative and is not equal to Infinite.

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.Infinite for the millisecondsTimeout 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 sychronize threads or manage resources.

This method does not perform standard COM and SendMessage pumping.

NoteNote

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.

The following example uses the Sleep method to block the application's main thread.

using System;
using System.Threading;

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

        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.
 */

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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