diff --git a/demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml b/demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml
index 3ed9f60..5f7355d 100644
--- a/demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml
+++ b/demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml
@@ -26,7 +26,7 @@
             <u:NumericUIntUpDown
                 Name="numd"
                 Width="{Binding Width}"
-                HorizontalAlignment="Stretch"
+                HorizontalAlignment="{Binding HorizontalAlignment}"
                 HorizontalContentAlignment="{Binding HorizontalContentAlignment}"
                 AllowDrag="{Binding AllowDrag}"
                 AllowSpin="{Binding AllowSpin}"
@@ -141,6 +141,8 @@
 
             <CheckBox Content="IsReadOnly" IsChecked="{Binding IsReadOnly}" />
 
+            <Label Content="HorizontalAlignment" />
+            <ComboBox ItemsSource="{Binding Array_HorizontalAlignment}" SelectedItem="{Binding HorizontalAlignment}" />
             <Label Content="HorizontalContentAlignment" />
             <ComboBox ItemsSource="{Binding Array_HorizontalContentAlignment}" SelectedItem="{Binding HorizontalContentAlignment}" />
 
diff --git a/demo/Ursa.Demo/ViewModels/NumericUpDownDemoViewModel.cs b/demo/Ursa.Demo/ViewModels/NumericUpDownDemoViewModel.cs
index c543bea..aa8abee 100644
--- a/demo/Ursa.Demo/ViewModels/NumericUpDownDemoViewModel.cs
+++ b/demo/Ursa.Demo/ViewModels/NumericUpDownDemoViewModel.cs
@@ -12,7 +12,7 @@ public partial class NumericUpDownDemoViewModel : ObservableObject
 {
 
 
-    private double _oldWidth=300;
+    private double _oldWidth = 300;
     [ObservableProperty] private bool _AutoWidth = true;
     [ObservableProperty] private double _Width = Double.NaN;
     [ObservableProperty] private uint _Value;
@@ -20,6 +20,9 @@ public partial class NumericUpDownDemoViewModel : ObservableObject
     [ObservableProperty] private bool _AllowDrag = false;
     [ObservableProperty] private bool _IsReadOnly = false;
 
+    [ObservableProperty] private Array _Array_HorizontalAlignment;
+    [ObservableProperty] private HorizontalAlignment _HorizontalAlignment = HorizontalAlignment.Center;
+
     [ObservableProperty] private Array _Array_HorizontalContentAlignment;
     [ObservableProperty] private HorizontalAlignment _HorizontalContentAlignment = HorizontalAlignment.Center;
     [ObservableProperty] private object? _InnerLeftContent = "obj:0x";
@@ -40,6 +43,7 @@ public partial class NumericUpDownDemoViewModel : ObservableObject
     public NumericUpDownDemoViewModel()
     {
         Array_HorizontalContentAlignment = Enum.GetValues(typeof(HorizontalAlignment));
+        Array_HorizontalAlignment = Enum.GetValues(typeof(HorizontalAlignment));
         Array_ParsingNumberStyle = Enum.GetValues(typeof(NumberStyles));
         NumericUIntUpDown numericUIntUpDown;
         TextBox textBox;