Exception Details :

=============================================================================================

System.InvalidOperationException occurred
  HResult=-2146233079
  Message=Collection was modified; enumeration operation may not execute.
  Source=ThinkGeo.MapSuite.Wpf
  StackTrace:
       at ThinkGeo.MapSuite.Wpf.Tile.DrawException(GeoCanvas geoCanvas, Exception exception)
       at ThinkGeo.MapSuite.Wpf.Tile.Draw(GeoCanvas geoCanvas)
       at ThinkGeo.MapSuite.Wpf.LayerOverlay.DrawTileCore(Tile tile, RectangleShape targetExtent)
       at ThinkGeo.MapSuite.Wpf.TileOverlay.DrawTile(Tile tile, RectangleShape targetExtent)
       at ThinkGeo.MapSuite.Wpf.TileOverlay.DrawCore(RectangleShape targetExtent, OverlayRefreshType overlayRefreshType)
       at ThinkGeo.MapSuite.Wpf.Overlay.Draw(RectangleShape targetExtent, OverlayRefreshType refreshType)
       at ThinkGeo.MapSuite.Wpf.WpfMap.IVM=(Overlay overlay, RectangleShape targetExtent, OverlayRefreshType overlayRefreshType, TimeSpan bufferTime, RequestDrawingBufferTimeType bufferTimeType)
       at ThinkGeo.MapSuite.Wpf.WpfMap.5BU=(IEnumerable`1 drawingOverlays, RectangleShape targetExtent, OverlayRefreshType refreshType, TimeSpan bufferTime, RequestDrawingBufferTimeType bufferTimeType)
       at ThinkGeo.MapSuite.Wpf.WpfMap.5BU=(RectangleShape targetExtent, OverlayRefreshType refreshType)
       at ThinkGeo.MapSuite.Wpf.WpfMap.DrawCore(RectangleShape targetExtent, OverlayRefreshType overlayRefreshType)
       at ThinkGeo.MapSuite.Wpf.WpfMap.Refresh()
       at CornesConnect.Helpers.Map.MapDynamicLayer.RefreshMapLayers(String[] args) in E:\CornesConnect\Phase-2\CornesWPF\Helpers\Map\MapDynamicLayer.cs:line 865
  InnerException: