using System;

using System.ComponentModel;

using System.Linq.Expressions;

​

public class ViewModelBase : INotifyPropertyChanged

{

    public event PropertyChangedEventHandler PropertyChanged = delegate {};

    protected void OnPropertyChanged(Expression<Func<object>> expression)

    {

        var f = (Func<object>)Expression.Lambda(expression).Compile().DynamicInvoke();

        if (expression == null || !(expression.Body is MemberExpression))

        {

            Console.WriteLine("Failed to notify something was set to \"" + f() + "\" :(");

            return;

        }

        PropertyChanged(this, new PropertyChangedEventArgs(((MemberExpression)expression.Body).Member.Name));

        Console.WriteLine("Successfully notified change of " + ((MemberExpression)expression.Body).Member.Name + " to \"" + f() + "\"!");

    }

}

​

public class TestViewModel : ViewModelBase

{

    int _ValueTypedMember;

    public int ValueTypedMember

    {

        get { return _ValueTypedMember; }

        set 

        {

            _ValueTypedMember = value;

            OnPropertyChanged(() => ValueTypedMember);

        }

    }

    string _RefTypedMember;

    public string RefTypedMember

    {

        get { return _RefTypedMember; }

        set 

        {

            _RefTypedMember = value;

            OnPropertyChanged(() => RefTypedMember);

        }

    }

}

​

public class Program

{

    public static void Main()

    {

        var vm = new TestViewModel();

        Console.WriteLine("Changing the reference typed member...");

        vm.RefTypedMember = "Hello World";

        Console.WriteLine("\nChanging the value typed member...");

        vm.ValueTypedMember = 42;

    }

}