Can I stop my WCF generating ArrayOfString instead of string[] or List<string>

I am having a minor problem with WCF service proxies where the message contains List<string> as a parameter.

I am using the 'Add Service reference' in Visual Studio to generate a reference to my service.

   // portion of my web service message
   public List<SubscribeInfo> Subscribe { get; set; }
   public List<string> Unsubscribe { get; set; }

These are the generated properties on my MsgIn for one of my web methods. You can see it used ArrayOfString when I am using List<string>, and the other takes List<SubscribeInfo> - which matches my original C# object above.

[System.Runtime.Serialization.DataMemberAttribute(EmitDefaultValue=false)]
public System.Collections.Generic.List<DataAccess.MailingListWSReference.SubscribeInfo> Subscribe {
    get {
        return this.SubscribeField;
    }
    set {
        if ((object.ReferenceEquals(this.SubscribeField, value) != true)) {
            this.SubscribeField = value;
            this.RaisePropertyChanged("Subscribe");
        }
    }
}

[System.Runtime.Serialization.DataMemberAttribute(EmitDefaultValue=false)]
publicDataAccess.MailingListWSReference.ArrayOfString Unsubscribe {
    get {
        return this.UnsubscribeField;
    }
    set {
        if ((object.ReferenceEquals(this.UnsubscribeField, value) != true)) {
            this.UnsubscribeField = value;
            this.RaisePropertyChanged("Unsubscribe");
        }
    }
}

The ArrayOfString class generated looks like this. This is a class generated in my code - its not a .NET class. It actually generated me a class that inherits from List, but didn't have the 'decency' to create me any constructors.

    [System.Diagnostics.DebuggerStepThroughAttribute()]
    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "3.0.0.0")]
    [System.Runtime.Serial