I had a problem with WCF test, and the problem was solved when I moved to the top of system.servicemodel. 
My question is, why does this matter? Doesn't .NET read the XML by the field names?

```
 <system.serviceModel>
<behaviors>
  <serviceBehaviors>
    <behavior name="MyServiceTypeBehaviors">
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="true" />
    </behavior>
  </serviceBehaviors>
</behaviors>
<bindings>
  <basicHttpBinding>
    <!-- Server-->
    <binding
      name="ws"
      transferMode="Streamed"
      messageEncoding="Mtom"
      maxReceivedMessageSize="10067108864"
      maxBufferSize="500000"
      maxBufferPoolSize="500000"
      receiveTimeout="10:00:00"
      sendTimeout="10:00:00"
      closeTimeout="10:00:00"
      openTimeout="10:00:00">
      <readerQuotas
        maxDepth="32"
        maxStringContentLength="2147483647"
        maxArrayLength="2147483647"
        maxBytesPerRead="4096"
        maxNameTableCharCount="16384" />
      <security mode="None">
        <transport clientCredentialType="None"/>
      </security>
    </binding>

    <!-- Server -->
      <binding 
        name="FileTransferServicesBinding" 
        transferMode="Streamed" 
        messageEncoding="Mtom" 
        maxReceivedMessageSize="10067108864" 
        maxBufferSize="500000" 
        maxBufferPoolSize="500000">
        <readerQuotas 
          maxDepth="32" 
          maxStringContentLength="655360" 
          maxArrayLength="655360" 
          maxBytesPerRead="4096" 
          maxNameTableCharCount="16384" />
      </binding>

  </basicHttpBinding>
</bindings>

<!-- Server -->
<services>
  <service behaviorConfiguration="MyServiceTypeBehaviors" name="Namespace.Namespace">
    <endpoint address="" binding="basicHttpBinding" bindingConfiguration="FileTransferServicesBinding" contract="Namespace.INamespaceSC" />
    <host>
      <baseAddresses>
        <add baseAddress="http://localhost:8081/Namespace" />
      </baseAddresses>
    </host>
    <endpoint address="mex" binding="mexHttpBinding" contract="Namespace.INamespaceSC" />
  </service>
</services>

<!-- Behaviors field was here before, when it didn't work -->

<!-- Client -->
<client>
  <endpoint
    address="http://localhost:8081/Namespace"
    binding="basicHttpBinding"
    bindingConfiguration="ws"
    contract="Namespace.INamespaceSC"
   />
</client></system.serviceModel>

```