How to work with arrays with null values

Program.cs

            string[] lString = new string[] { "All", "Apples", null, null };

            /* Using an enumerator to step through the array of strings where the values are not null */
            IEnumerator enumerator = (from lValue in lString where lValue != null select lValue).ToArray().GetEnumerator();
            while (enumerator.MoveNext())
            {
                Console.WriteLine(enumerator.Current);
            }

            /* For each string in the array, select where the value is not null, and do something with the value */
            foreach (string current_str in lString.Select(x => x).Where(value_is => value_is != null))
            {
                Console.WriteLine(current_str);
            }

            /* Order them like this with nulls last */
            string[] ordered_Array = lString.OrderBy(x => x == null).ToArray();

            /* Order them and then select the ones where the value is not null and set it to a new array without nulls */
            string[] without_Nulls = lString.OrderBy(x => x != null).Select(x => x).Where(value_is => value_is != null).ToArray();