private void CustomMarkManager_MarkAdded(CustomMarkManager sender, CustomMarkDataEventArgs e)
 {
     this.AddMarker(e.MarkData[0]);
 }
 private void CustomMarkManager_MarkListChanged(CustomMarkManager sender, CustomMarkDataEventArgs e)
 {
     this.Load(e.MarkData);
 }
 private void CustomMarkManager_MarkRemoved(CustomMarkManager sender, CustomMarkDataEventArgs e)
 {
     this.RemoveMarker(e.MarkData[0].Key);
 }