ViewModelBase_NoMagicStrings.cs

internal class ViewModelBase : INotifyPropertyChanged 
{
    #region Implementation INotifyPropertyChanged

    public event PropertyChangedEventHandler PropertyChanged = delegate { };

    protected void OnPropertyChanged(Expression<Func<object>> expression)
    {
       if (expression == null || !(expression.Body is MemberExpression))
       {
           return;
       }

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

    #endregion Implementation INotifyPropertyChanged
}

This code sample works for Reference typed member values, but NOT for Value typed members.
See this dotnetfiddle for an example of the failure: https://dotnetfiddle.net/Xgpo5W