ArcGISPortalViewer.ViewModel.MapViewModel.GetVertexSymbol C# (CSharp) Method

        private Esri.ArcGISRuntime.Symbology.Symbol GetVertexSymbol(int index)
        {
            return new CompositeSymbol()
                       {
                           Symbols = new SymbolCollection(new Esri.ArcGISRuntime.Symbology.Symbol[]                        
                            {
                                new SimpleMarkerSymbol()
                                {
                                    Color = Colors.White, Size = 14,
                                    Outline = new SimpleLineSymbol() {Width = 1.5, Color = Colors.CornflowerBlue},
                                },
                                new TextSymbol()
                                {
                                    Text =string.Format("{0}", index, System.Globalization.CultureInfo.InvariantCulture),
                                    HorizontalTextAlignment = HorizontalTextAlignment.Center,
                                    VerticalTextAlignment = VerticalTextAlignment.Middle
                                }
                            })
                       };
        }
        #endregion Measure Tool