Merge pull request #115 from irihitech/issue/53

fix: fix #53.

demo/Ursa.Demo/ViewModels/IPv4BoxDemoViewModel.cs

@@ -1,6 +1,20 @@
+using System;
+using System.Net;
+using CommunityToolkit.Mvvm.ComponentModel;
+
 namespace Ursa.Demo.ViewModels;
 
-public class IPv4BoxDemoViewModel: ViewModelBase
+public partial class IPv4BoxDemoViewModel: ObservableObject
 {
+    [ObservableProperty] private IPAddress? _address;
     
+    public IPv4BoxDemoViewModel()
+    {
+        Address = IPAddress.Parse("192.168.1.1");
+    }
+    public void ChangeAddress()
+    {
+        long l = Random.Shared.NextInt64(0x00000000FFFFFFFF);
+        Address = new IPAddress(l);
+    }
 }