Avalonia Start

LaDOSE.Src/LaDOSE.DesktopApp.Avalonia/Utils/BaseViewModel.cs

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+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using ReactiveUI;
+
+namespace LaDOSE.DesktopApp.Avalonia.Utils;
+
+public abstract class BaseViewModel : ReactiveObject, IRoutableViewModel,INotifyPropertyChanged
+{
+    
+    public event PropertyChangedEventHandler? PropertyChanged;
+    protected void RaisePropertyChanged([CallerMemberName] string? propertyName = null)
+    {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+
+    protected BaseViewModel(IScreen hostScreen, string? urlPathSegment)
+    {
+        UrlPathSegment = urlPathSegment;
+        HostScreen = hostScreen;
+    }
+
+    public string? UrlPathSegment { get; }
+    public IScreen HostScreen { get; }
+}