Invalid postback or callback argument. Event validation is enabled using in configuration or in a page. For security purposes, ...

.NET Framework

Invalid postback or callback argument.  Event validation is enabled using  in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Invalid or unrecognized UltimateResourceFallbackLocation value in the NeutralResourcesLanguageAttribute for assembly "{1}". ... Invalid or unrecognized UltimateResourceFallbackLocation value in the NeutralResourcesLanguageAttribute for assembly "{1}". ... Invalid parameter '{0}' in one way operation '{1}', contract '{2}'. Parameters in one way operations cannot be out parameters ... Invalid path mapping '{0}'. A path in a ScriptResourceDefinition must be a non-relative virtual path or an encoded absolute ... Invalid postback or callback argument. Event validation is enabled using in configuration or in a page. For security purposes, ... Invalid posted data for current ObjectList ViewMode. (The ObjectList may have been databound on postback during Page_Load, ... Invalid root element found in the mapping file. Make sure that the root element's local name is 'Mapping' and the namespaceURI ... Invalid ServicedComponent-derived classes were found in the assembly. (Classes must be public, concrete, have a public default ... Invalid SQLUserInstance.dll found at the location specified in the registry. Verify that the Local Database Runtime feature ...