Is there a way to find the max length of a property among all elements in ICollection

So i need to make ICollection into a table, column width must be determined by max length of value of property. I currently use this

        private static int GetWidth<T>(PropertyInfo prop, ICollection<T> source)
        {
            int width = 5;
            foreach (var element in source)
            {
                if (prop.GetValue(element).ToString().Length > width)
                {
                    width = prop.GetValue(element).ToString().Length;
                }
            }

            return width;
        }

but it does not work at all, maybe someone knows a way to do it? Edit: solved, used Math.Max(5, source.Max(e => prop.GetValue(e).ToString().Length)) instead