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    <p>WCF will only ever transmit data - you <strong>cannot</strong> expose a "method" via WCF. </p> <p>WCF is a <strong>serialized messaging</strong> system - only serialized data travels between client and server - there is <strong>no other connection</strong> (no "remote object" or something like that) going on.</p> <p>But both <code>string</code> and <code>int</code> should be handled no problem.... </p> <p>Maybe you are stumbling over this behavior?? I don't fully understand where your problem is, too - what are you expecting, and what are you seeing instead?? What does your service method actually do in its implementation??</p> <p><strong>Update:</strong> when I do the same thing as you have, and then use <a href="http://msdn.microsoft.com/en-us/library/ms733025.aspx" rel="nofollow">WCF Tracing</a> to see what's happening, this is the request going into the service:</p> <pre><code>&lt;s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"&gt; &lt;s:Header&gt; &lt;To s:mustUnderstand="1" xmlns="http://schemas.microsoft.com/ws/2005/05/addressing/none"&gt;http://localhost:8433/Services/GetStuff&lt;/To&gt; &lt;Action s:mustUnderstand="1" xmlns="http://schemas.microsoft.com/ws/2005/05/addressing/none"&gt;http://tempuri.org/IGetStuffService/GetStuff&lt;/Action&gt; &lt;/s:Header&gt; &lt;s:Body&gt; &lt;GetStuff xmlns="http://tempuri.org/"&gt; &lt;data xmlns:a="http://schemas.datacontract.org/2004/07/wcf_test" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"&gt; &lt;a:P_Integer&gt;5&lt;/a:P_Integer&gt; &lt;a:P_String&gt;Where to go for holidays...&lt;/a:P_String&gt; &lt;/data&gt; &lt;/GetStuff&gt; &lt;/s:Body&gt; &lt;/s:Envelope&gt; </code></pre> <p>So what is it you're not seeing that should be there??..... I clearly see both the integer and the string value in that SOAP message - as expected.</p> <p>Could it be you're not seeing your value of <code>1</code> because that's hidden away in the byte stream somewhere?? Try specifying some other value, like <code>4711067</code> or something - that won't get lost in your message....</p> <p>To enable WCF tracing, put these two sections into your <code>web.config</code> or <code>app.config</code> of your WCF service:</p> <pre><code>&lt;system.diagnostics&gt; &lt;sources&gt; &lt;source name="UserTraceSource" switchValue="Warning, ActivityTracing" &gt; &lt;listeners&gt; &lt;add name="xml" type="System.Diagnostics.XmlWriterTraceListener" initializeData="C:\logs\UserTraces.svclog" /&gt; &lt;/listeners&gt; &lt;/source&gt; &lt;/sources&gt; &lt;trace autoflush="true" /&gt; &lt;/system.diagnostics&gt; </code></pre> <p>(make sure the <code>C:\logs</code> directory exists before hand!!), and </p> <pre><code>&lt;system.serviceModel&gt; &lt;diagnostics&gt; &lt;messageLogging maxMessagesToLog="30000" logEntireMessage="true" logMalformedMessages="true" logMessagesAtServiceLevel="false" logMessagesAtTransportLevel="true"&gt; &lt;filters&gt; &lt;clear/&gt; &lt;/filters&gt; &lt;/messageLogging&gt; &lt;/diagnostics&gt; &lt;/system.serviceModel&gt; </code></pre> <p>Now you'll get <code>*.svclog</code> files in <code>C:\logs</code> - open Windows Explorer, double-click on them, and you should be taken into the <a href="http://msdn.microsoft.com/en-us/library/ms732023.aspx" rel="nofollow">WCF Trace Viewer</a> for analysis.</p>
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    1. POWhen passing an object as an argument to a method, string properties are populated, but integers are null
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    1. COI'm expecting to see XML being sent back with values for the String and the Integer contained in the class. I only see values for the String
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    2. COYours looks like what I expect. Hmm..
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    3. CO@Leroy: can you try to enable WCF tracing on your service side, and see what you get??
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