c# fitler lsit and return first code example

Example 1: c# select first value from list

lstComp.First();
//You can also use FirstOrDefault() just in case lstComp does not contain any items.

//To get the Component Value:
var firstElement = lstComp.First().ComponentValue("Dep");

//This would assume there is an element in lstComp. An alternative and safer way would be...
var firstOrDefault = lstComp.FirstOrDefault();
if (firstOrDefault != null) 
{
    var firstComponentValue = firstOrDefault.ComponentValue("Dep");
}

Example 2: linq filter list c#

using System;
using System.Linq;
using System.Collections.Generic;
 
namespace IntroducingLINQ
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Book> bookList = new List<Book>()
            {
                new Book("Les Miserables", "Victor Hugo", 1862),
                new Book("L'Etranger", "Albert Camus", 1942),
                new Book("Madame Bovary", "Gustave Flaubert", 1857),
                new Book("Le Comte de Monte-Cristo", "Alexandre Dumas", 1844),
                new Book("Les Trois Mousquetaires", "Alexandre Dumas", 1844),
                new Book("Candide", "Voltaire", 1759),
                new Book("Notre-Dame de Paris", "Victor Hugo", 1831),
                new Book("Vingt mille lieues sous les mers", "Jules Verne", 1872),
                new Book("Le Tour du monde en quatre-vingts jours", "Jules Verne", 1869),
                new Book("Voyage au centre de la Terre", "Jules Verne", 1864)
            };
        }
    }
 
    class Book
    {
        public string Title { get; set; }
        public string Author { get; set; }
        public int PubDate { get; set; }
 
        public Book(string title, string author, int pubDate)
        {
            Title = title;
            Author = author;
            PubDate = pubDate;
        }
    }
}