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RefreshEventHandler Delegate

Represents the method that handles the Refreshed event raised when a Type or component is changed during design time.

Namespace:  System.ComponentModel
Assembly:  System (in System.dll)

[HostProtectionAttribute(SecurityAction.LinkDemand, SharedState = true)]
public delegate void RefreshEventHandler(
	RefreshEventArgs e


Type: System.ComponentModel.RefreshEventArgs

A RefreshEventArgs that contains the component or Type that changed.


The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: SharedState. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

When you create a RefreshEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see Events and Delegates.

The following sample demonstrates how to use a RefreshEventHandler delegate to handle the Refreshed event when a type or component changes. In the code, the OnRefreshed event handles the event and displays the component being changed.

The code assumes that a TextBox control is already sited on the form.

private void Form1_Load(object sender, System.EventArgs e)
    textBox1.Text = "changed";
    System.ComponentModel.TypeDescriptor.Refreshed += new

protected static void OnRefresh(System.ComponentModel.RefreshEventArgs e)

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