public static string GetPropertyName<TModel, TValue>(Expression<Func<TModel, TValue>> propertySelector, char delimiter = '.', char endTrim = ')')
        {
            var asString = propertySelector.ToString();
            var firstDelim = asString.IndexOf(delimiter);
            return firstDelim < 0  ? asString : asString.Substring(firstDelim + 1).TrimEnd(endTrim);
        }


//pouziti:            var name = GetPropertyName<ProductsEditViewModel, object>(m => m.Product.ProductCode);