void BuildList()
 {
     foreach (var target in MeadowProject.DeploymentTargetsManager.GetTargetList())
     {
         var node = new MyTreeNode(target, icon);
         Store.AddNode(node);
     }
 }
        async void BuildList()
        {
            var fileList = await meadowPad.meadowSerialDevice.GetFilesOnDevice();

            Store.Clear();
            foreach (var file in fileList)
            {
                var node = new MyTreeNode(file);
                Store.AddNode(node);
            }
        }