如何使用Exist in List在c#

我必须找到字符串是否存在于列表中，以避免重复插入:以下是来自Microsoft网站的示例:

using System;
using System.Collections.Generic;
public class Example
{
    public static void Main()
    {
        List<string> dinosaurs = new List<string>();
        dinosaurs.Add("Compsognathus");
        dinosaurs.Add("Amargasaurus");
        dinosaurs.Add("Oviraptor");
        dinosaurs.Add("Velociraptor");
        dinosaurs.Add("Deinonychus");
        dinosaurs.Add("Dilophosaurus");
        dinosaurs.Add("Gallimimus");
        dinosaurs.Add("Triceratops");
        Console.WriteLine();
        foreach(string dinosaur in dinosaurs)
        {
            Console.WriteLine(dinosaur);
        }
        Console.WriteLine("'nTrueForAll(EndsWithSaurus): {0}",
            dinosaurs.TrueForAll(EndsWithSaurus));
        Console.WriteLine("'nFind(EndsWithSaurus): {0}", 
            dinosaurs.Find(EndsWithSaurus));
        Console.WriteLine("'nFindLast(EndsWithSaurus): {0}",
            dinosaurs.FindLast(EndsWithSaurus));
        Console.WriteLine("'nFindAll(EndsWithSaurus):");
        List<string> sublist = dinosaurs.FindAll(EndsWithSaurus);
        foreach(string dinosaur in sublist)
        {
            Console.WriteLine(dinosaur);
        }
        Console.WriteLine(
            "'n{0} elements removed by RemoveAll(EndsWithSaurus).", 
            dinosaurs.RemoveAll(EndsWithSaurus));
        Console.WriteLine("'nList now contains:");
        foreach(string dinosaur in dinosaurs)
        {
            Console.WriteLine(dinosaur);
        }
        Console.WriteLine("'nExists(EndsWithSaurus): {0}", 
            dinosaurs.Exists(EndsWithSaurus));
    }
    // Search predicate returns true if a string ends in "saurus".
    private static bool EndsWithSaurus(String s)
    {
        return s.ToLower().EndsWith("saurus");
    }
}

是否可以用lambda表达式代替EndsWithSaurus函数?谢谢大家的意见!!下面是一个工作代码:

        if (dinosaurs.Any(e => e.EndsWith("saurus")))
            Console.WriteLine("saurus exists");
        if (dinosaurs.Exists(e => e.EndsWith("saurus")))
            Console.WriteLine("saurus exists");

if (dinosaurs.Exists(e => e.EndsWith("saurus")))
        Console.WriteLine("saurus exists");

if (dinosaurs.Any(e => e.EndsWith("saurus")))
        Console.WriteLine("saurus exists");

if (dinosaurs.Exists(e => e.EndsWith("saurus"))   // == true is implied
        Console.WriteLine("saurus exists");