private string ValidateIssuer(string issuer, TokenValidationParameters validationParameters, DerivedSamlSecurityTokenHandler samlSecurityTokenHandler, ExpectedException expectedException)
        {
            string returnVal = string.Empty;

            try
            {
                returnVal = samlSecurityTokenHandler.ValidateIssuerPublic(issuer, new DerivedSaml2SecurityToken(), validationParameters);
                expectedException.ProcessNoException();
            }
            catch (Exception exception)
            {
                expectedException.ProcessException(exception);
            }

            return(returnVal);
        }
        private string ValidateIssuer(string issuer, TokenValidationParameters validationParameters, DerivedSamlSecurityTokenHandler samlSecurityTokenHandler, ExpectedException expectedException)
        {
            string returnVal = string.Empty;
            try
            {
                returnVal = samlSecurityTokenHandler.ValidateIssuerPublic(issuer, new DerivedSaml2SecurityToken(), validationParameters);
                expectedException.ProcessNoException();
            }
            catch (Exception exception)
            {
                expectedException.ProcessException(exception);
            }

            return returnVal;
        }