title: xamarin forms group listview checkboxs
body: <p>Checkboxs are generated in the Listview. The status of the checkbox need to stored in the  local storage. Is there any way to bind two separate list into one Listview.</p>
  <p>First List:</p>
  <pre><code>    List&lt;mergedfeature&gt; mergedfeatures = new List&lt;mergedfeature&gt;();
      
                 
                      var res = (from layer in layers
                                       join cat in category
                                       on layer.feature_cat equals cat.id
                                       select new
                                       {
                                           name = cat.category_name,
                                           Mfeatures = layer,
                                           isChecked = true
                                       }).ToList();
  
  Second List:
  
       public int id { get; set; }
       public string layer_name { get; set; }
       public bool LayerChecked { get; set;}
       public string group_name { get; set;}
  
  </code></pre>