ViewModelBase.cs

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using System.ComponentModel;
using System.Runtime.CompilerServices;
 
namespace Dreamine.MVVM.ViewModels
{
    public abstract partial class ViewModelBase : INotifyPropertyChanged, INotifyPropertyChanging
    {
        public event PropertyChangedEventHandler? PropertyChanged;

        public event PropertyChangingEventHandler? PropertyChanging;

        // null! is intentional: CallerMemberName always supplies the caller's member name at compile time.
        protected void OnPropertyChanged([CallerMemberName] string propertyName = null!)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        protected void OnPropertyChanging([CallerMemberName] string propertyName = null!)
        {
            PropertyChanging?.Invoke(this, new PropertyChangingEventArgs(propertyName));
        }

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