ArcGISWindowsPhoneSDK.ClosestFacility.ClearButton_Click C# (CSharp) Method

        private void ClearButton_Click(object sender, EventArgs e)
        {
            foreach (Layer layer in MyMap.Layers)
                if (layer is GraphicsLayer)
                    (layer as GraphicsLayer).Graphics.Clear();

            MyRouteInfoWindow.IsOpen = false;

            ((ApplicationBarIconButton)ApplicationBar.Buttons[2]).IsEnabled = false;
        }