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Application.ThreadExit Event

Occurs when a thread is about to shut down. When the main thread for an application is about to be shut down, this event is raised first, followed by an ApplicationExit event.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public static event EventHandler ThreadExit

You must attach the event handlers to the ThreadExit event to perform any unhandled, required tasks before the thread stops running. Close files opened by this thread, or dispose of objects that the garbage collector did not reclaim.

Caution noteCaution:

Because this is a static event, you must detach your event handlers when your application is disposed, or memory leaks will result.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the ThreadExit event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a Windows Forms and ensure that the event handler is associated with the ThreadExit event.

private void Application_ThreadExit(Object sender, EventArgs e) {

   MessageBox.Show("You are in the Application.ThreadExit event.");


Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0