Sheepings

using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;

namespace WPFTestApp
{
    public partial class Window1 : Window
    {

Sheepings

    public class Student
    {
        public string Name { get; set; }

        public enum Gender
        {
            Male, Female
        }

        public int Age { get; set; }

Sheepings

            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 */