ArcGISWindowsPhoneSDK.FeatureSetJson.Button_ClearMap C# (CSharp) Method

        private void Button_ClearMap(object sender, RoutedEventArgs e)
        {
            List<GraphicsLayer> graphicsLayers = new List<GraphicsLayer>();

            foreach (Layer layer in MyMap.Layers)
                if (layer is GraphicsLayer)
                    graphicsLayers.Add(layer as GraphicsLayer);

            for (int i = 0; i < graphicsLayers.Count; i++)
                MyMap.Layers.Remove(graphicsLayers[i]);
        }