private void AssertXmlContentParserExceptionIsThrown(string messageContent)
        {
            XmlContentParserException exception = Assert.Throws <XmlContentParserException>(() =>
            {
                ContainsXmlElementsValidator.Validate(messageContent);
            });

            exception.Message.Should().Be("The specified message content does not contain any valid XML elements.");
        }
 public void MessageContentWithXmlElementsDoesNotThrowException(string messageContent)
 {
     Assert.DoesNotThrow(() => ContainsXmlElementsValidator.Validate(messageContent));
 }