Defines the metadata attribute that Web server controls use to indicate support for event validation. This class cannot be inherited.
Assembly: System.Web (in System.Web.dll)
Event validation prevents forged postbacks to an ASP.NET Web page and can be enabled through the EnableEventValidation page directive.
If you do not define the attribute, your custom control does not automatically participate in event validation. However, your control can explicitly call ValidateEvent. If you handle event registration and validation, call ValidateEvent, and then you do not need to define this attribute on the control.
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.