http://msmvps.com/blogs/peterritchie/archive/2009/05/04/unit-testing-wcf-data-contract-serialization.aspxWCF service define &quot;data contracts&quot; for their interfaces. These contracts are often defined in an XML schema document and used to generated WCF data contract code. This process effectively creates a .NET type that will serialize to a chunk ofenCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/peterritchie/archive/2009/05/04/unit-testing-wcf-data-contract-serialization.aspx#1723204Mon, 14 Sep 2009 09:37:33 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1723204riezebosch<p>The DataContractSerializer will throw an exception when for example required fields are empty. Wouldn&#39;t it therefore be enough to just call the WriteObject and return nothing?</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1723204" width="1" height="1">