When implemented by a class, gets or sets the error message text generated when the condition being validated fails.
Assembly: System.Web (in System.Web.dll)
ASP.NET developers access this property declaratively in the opening tag of a validation server control. For more information, see Validation Server Control Syntax.
This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.