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.....