How to get rid of the default xml namespace if i am the one to serialize an object to wcf using datacontact

Here is my interface

[ServiceContract(Namespace = "")]      
interface IParam     {     } 

      

        
        
        
      

    

Here is my class

public class Parameter : IParam
{

    private string categoryName;

    [DataMember]
    public string CategoryName
    {
        get { return categoryName; }
        set { categoryName = value; }
    }


}

      

        
        
        
      

    

My work contact

[OperationContract]
string GetSegmentsByCategoryName(Parameter Params);

      

        
        
        
      

    

Here is my main one:

Parameter abc = new Parameter ();
abc.CategoryName = "xxx";

str = client.Channel.GetSegmentsByCategoryName(abc);

      

        
        
        
      

    

when i check on wireshark i got this xml

<Params xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<CategoryName>
xxx
</CategoryName>
</Params>

      

        
        
        
      

    

i to get rid of the xmlns: i = "http://www.w3.org/2001/XMLSchema-instance when i pass the object via wcf httpbinding.