Increment and decrement the value of SfNumericUpDown control in UWP

<Grid x:Name="Grid1" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
   <syncfusion:SfNumericUpDown x:Name="sfupdown" SmallChange="5" Height="35"
                               Width="250">
   </syncfusion:SfNumericUpDown>
 </Grid>

namespace SfNumericTextBox_sample
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            SfNumericUpDown sfupdown = new SfNumericUpDown();
            sfupdown.Height = 35;
            sfupdown.Width = 250;
            sfupdown.SmallChange = 5d;
            Grid1.Children.Add(sfupdown);
        }
    }
}