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Unload Event
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Control.Unload Event

Occurs when the server control is unloaded from memory.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

public event EventHandler Unload

Server controls must perform any final clean-up, such as closing files, database connections and discarding objects, during this stage of the control lifecycle before the instance is unloaded.

TopicLocation
How to: Create Event Handlers in ASP.NET Web PagesBuilding ASP .NET Web Applications
How to: Create Event Handlers in ASP.NET Web PagesBuilding ASP .NET Web Applications

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
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