Sets several important properties on the ErrorWebPart control prior to rendering, to prevent users from being able to personalize the control.
Assembly: System.Web (in System.Web.dll)
The method sets properties on an ErrorWebPart control before it is rendered. These properties prevent users from hiding, minimizing, editing, or exporting the control, or changing its ChromeState value. However, users can close or delete an ErrorWebPart control instance.Notes to Inheritors
This method can be overridden in an inherited ErrorWebPart control. Developers might want to override the method to set additional properties on the control, such as a default ErrorMessage property value.
To require the WebPartManager control to use a custom ErrorWebPart control, you must also inherit from the WebPartManager class and override its CreateErrorWebPart method. In that method, you should assign the value of the method's errorMessage parameter to the ErrorMessage property of your custom ErrorWebPart control, because the WebPartManager control calls this method from several other places, and usually passes in a specific error message.