public static PropertyChangedEventArgs <TProperty> GetArgs <TProperty>(Expression <Func <T, TProperty> > expr)
        {
            var name = expr.GetMember();

            return(PropertyChangedArgsStore <TProperty> .GetArgs(name));
        }
 public static PropertyChangedEventArgs <TProperty> GetArgs <TProperty>(string name)
 {
     return(PropertyChangedArgsStore <TProperty> .GetArgs(name));
 }