Gets or sets a custom user name and password validator.
Assembly: System.ServiceModel (in System.ServiceModel.dll)
The UserNamePasswordValidationMode property must be set to MembershipProvider for the MembershipProvider to take effect. When the MembershipProvider property is set and the UserNamePasswordValidationMode property is not, WCF uses Windows authentication and ignores the value of the MembershipProvider property.
Available since 3.0