Avalonia/samples/IntegrationTestApp/ViewModels/ViewModelBase.cs

using System.Collections.Generic;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace IntegrationTestApp.ViewModels;

internal class ViewModelBase : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler? PropertyChanged;

    protected bool RaiseAndSetIfChanged<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
    {
        if (!EqualityComparer<T>.Default.Equals(field, value))
        {
            field = value;
            RaisePropertyChanged(propertyName);
            return true;
        }
        return false;
    }

    protected void RaisePropertyChanged([CallerMemberName] string? propertyName = null)
        => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}