Public Class MyRequestValidator >> Inherits System.Web.Util.RequestValidator >> Protected Overrides Function IsValidRequestString(context As HttpContext, value As String, requestValidationSource__1 As System.Web.Util.RequestValidationSource, collectionKey As String, ByRef validationFailureIndex As Integer) As Boolean >> validationFailureIndex = 0 >> >> 'Spurious rejection test >> If requestValidationSource__1 = RequestValidationSource.RawUrl AndAlso value.Contains("Default") Then >> Return False >> End If >> >> >> Return MyBase.IsValidRequestString(context, value, requestValidationSource__1, collectionKey, validationFailureIndex) >> End Function >>End Classand then reference that in web.config.....