await QueuedTask.Run(() =>
        {
          pOutLay = (FeatureLayer)LayerFactory.Instance.CreateLayer(new Uri(url), MapView.Active.Map);
          pSpatRef = SpatialReferenceBuilder.CreateSpatialReference(32655); //UTM55N
          EditOperation createFeatEditOp = new EditOperation();
          createFeatEditOp.Name = "CreateImageEdges";
          createFeatEditOp.SelectModifiedFeatures = false;
          createFeatEditOp.SelectNewFeatures = false;

          foreach (Item itm in items)
          {
            lstPnt = new List<MapPoint>();
            string path = itm.Path.Substring(0, itm.Path.LastIndexOf(@"\"));
            string strFile = itm.Path.Substring(itm.Path.LastIndexOf(@"\") + 1);
            FileSystemConnectionPath connectionPath = new FileSystemConnectionPath(new System.Uri(path), FileSystemDatastoreType.Raster);
            FileSystemDatastore dataStore = new FileSystemDatastore(connectionPath);
            RasterDataset fileRasterDataset = dataStore.OpenDataset<RasterDataset>(strFile);
            Raster pRas = fileRasterDataset.CreateDefaultRaster();
            pTup = pRas.PixelToMap(0, 0);
            lstPnt.Add(MapPointBuilder.CreateMapPoint(pTup.Item1, pTup.Item2));
            pTup = pRas.PixelToMap(0, pRas.GetWidth());
            lstPnt.Add(MapPointBuilder.CreateMapPoint(pTup.Item1, pTup.Item2));
            pTup = pRas.PixelToMap(pRas.GetHeight(), pRas.GetWidth());
            lstPnt.Add(MapPointBuilder.CreateMapPoint(pTup.Item1, pTup.Item2));
            pTup = pRas.PixelToMap(pRas.GetHeight(), 0);
            lstPnt.Add(MapPointBuilder.CreateMapPoint(pTup.Item1, pTup.Item2));
            pTup = pRas.PixelToMap(0, 0);
            lstPnt.Add(MapPointBuilder.CreateMapPoint(pTup.Item1, pTup.Item2));


            pPline = PolylineBuilder.CreatePolyline(lstPnt, pSpatRef);
            dctAtts = new Dictionary<string, object>();
            dctAtts.Add("SHAPE", pPline);
            dctAtts.Add("Image", strFile);
            dctAtts.Add("Width", pRas.GetWidth());
            dctAtts.Add("Height", pRas.GetHeight());
            createFeatEditOp.Create(pOutLay, dctAtts);
          }
          createFeatEditOp.Execute();

        });
      }
      catch (Exception ex)
      {
        MessageBox.Show(ex.Message);
      }
    }