Applying Data Templates Dynamically by Type in WP7

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using GalaSoft.MvvmLight;
namespace dynDataTemplateTest.View
{
    public class DynamicContentControl:ContentControl
    {
        protected override void OnContentChanged(object oldContent, object newContent)
        {
            base.OnContentChanged(oldContent, newContent);
            this.ContentTemplate = mSator.Model.DataTemplateSelector.GetTemplate(newContent as ViewModelBase);
        }        
    }
}