title: remove xmlns:i="http://www.w3.org/2001/XMLSchema-instance" when using DataContractSerializer
body: <p>how can I remove the xmlns:i="http://www.w3.org/2001/XMLSchema-instance" when using DataContractSerializer.</p>
  
  <p>this is what I'm getting:</p>
  
  <pre><code>&lt;ProfileModel xmlns:i="http://www.w3.org/2001/XMLSchema-instance"&gt;
    &lt;Email&gt;wolverine@wolverine.com&lt;/Email&gt;
    &lt;FirstName&gt;wolverine&lt;/FirstName&gt;
    &lt;ID&gt;ty1002225&lt;/ID&gt;
    &lt;LastName&gt;wolverine3&lt;/LastName&gt;
    &lt;PhoneNumber&gt;66332214477&lt;/PhoneNumber&gt;
    &lt;SourceSystem&gt;TY&lt;/SourceSystem&gt;
  &lt;/ProfileModel&gt;
  </code></pre>
  
  <p>I want to get something like this:</p>
  
  <pre><code>&lt;ProfileModel&gt;
        &lt;Email&gt;wolverine@wolverine.com&lt;/Email&gt;
        &lt;FirstName&gt;wolverine&lt;/FirstName&gt;
        &lt;ID&gt;ty1002225&lt;/ID&gt;
        &lt;LastName&gt;wolverine3&lt;/LastName&gt;
        &lt;PhoneNumber&gt;66332214477&lt;/PhoneNumber&gt;
        &lt;SourceSystem&gt;TY&lt;/SourceSystem&gt;
      &lt;/ProfileModel&gt;
  </code></pre>
  
  <p>this is my model:</p>
  
  <pre><code>[DataContract(Namespace = "")]
      public class CRMProfileModel
      {
          [DataMember]
          public string FirstName { get; set; }
          [DataMember]
          public string LastName { get; set; }
          [DataMember]
          public string Email { get; set; }
          [DataMember]
          public string PhoneNumber { get; set; }
          [DataMember]
          public string SourceSystem { get; set; }
          [DataMember]
          public string ID { get; set; }
      }
  </code></pre>
  
  <p>I'm trying to avoid to use string replace to remove it.</p>