add new demo view which can change the property

demo/Ursa.Demo/ViewModels/NumericUpDownDemoViewModel.cs

@@ -1,8 +1,50 @@
-using CommunityToolkit.Mvvm.ComponentModel;
+using Avalonia.Controls;
+using Avalonia.Layout;
+using CommunityToolkit.Mvvm.ComponentModel;
+using System;
+using System.Globalization;
+using Ursa.Controls;
+using static System.Runtime.InteropServices.JavaScript.JSType;
 
 namespace Ursa.Demo.ViewModels;
 
-public class NumericUpDownDemoViewModel: ObservableObject
+public partial class NumericUpDownDemoViewModel : ObservableObject
 {
-    
+
+    [ObservableProperty] private uint _Value;
+    [ObservableProperty] private string _FontFamily = "Consolas";
+    [ObservableProperty] private bool _AllowDrag = false;
+    [ObservableProperty] private bool _IsReadOnly = false;
+
+    [ObservableProperty] private Array _Array_HorizontalContentAlignment;
+    [ObservableProperty] private HorizontalAlignment _HorizontalContentAlignment = HorizontalAlignment.Center;
+    [ObservableProperty] private object? _InnerLeftContent = "obj:0x";
+    [ObservableProperty] private string _Watermark = "Water mark showed";
+    [ObservableProperty] private string _FormatString = "x8";
+    [ObservableProperty] private Array _Array_ParsingNumberStyle;
+    [ObservableProperty] private NumberStyles _ParsingNumberStyle = NumberStyles.AllowHexSpecifier;
+    [ObservableProperty] private bool _AllowSpin = true;
+    [ObservableProperty] private bool _ShowButtonSpinner = true;
+
+    [ObservableProperty] private UInt32 _Maximum = UInt32.MaxValue;
+    [ObservableProperty] private UInt32 _Minimum = UInt32.MinValue;
+    [ObservableProperty] private UInt32 _Step = 1;
+
+    [ObservableProperty] private bool _IsEnable = true;
+
+
+    public NumericUpDownDemoViewModel()
+    {
+        Array_HorizontalContentAlignment = Enum.GetValues(typeof(HorizontalAlignment));
+        Array_ParsingNumberStyle = Enum.GetValues(typeof(NumberStyles));
+        NumericUIntUpDown numericUIntUpDown;
+        TextBox textBox;
+        
+    }
+
+    partial void OnValueChanging(uint oldValue, uint newValue)
+    {
+        Console.WriteLine(oldValue);
+    }
+
 }