public void WhenConvertingFromContentToXmlDocumentThenDocumentContainsProperXml()
 {
     var content = new StringContent(Xml);
     var document = content.ReadAsXmlDocument();
     var builder = new StringBuilder();
     var writer = new StringWriter(builder);
     document.Save(writer);
     var xml = builder.ToString();
     Assert.IsTrue(xml.Contains(Xml));
 }