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ToolStripDropDown.Close Method (ToolStripDropDownCloseReason)

Note: This method is new in the .NET Framework version 2.0.

Closes the ToolStripDropDown control for the specified reason.

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

public void Close (
	ToolStripDropDownCloseReason reason
public void Close (
	ToolStripDropDownCloseReason reason
public function Close (
	reason : ToolStripDropDownCloseReason



One of the ToolStripDropDownCloseReason values.

Use the Close method to close a ToolStripDropDown control under specific conditions, such as when an application is started or an item is selected by clicking the control, if the focus changes, or if specified keyboard action occurs.

The following code example demonstrates how to specify a close reason when explicitly closing a ToolStripDropDown control with the Close method.

// This method explicitly closes the ToolStripDropDown control
// and specifies the reason for closing as CloseCalled.
private void closeButton_Click(object sender, EventArgs e)

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0