c# find element in list

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List<string> list = new List<string> { "A1", "A2", "B1" };
string item = "A2";

bool result = list.Contains(item); // True

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List<string> list = new List<string> { "A1", "A2", "B1" };
string search = "A2";

int result = list.IndexOf(search); // 1

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List<string> list = new List<string> { "A1", "A2", "B1" };
string item = "A2";

int result = list.FindIndex(x => x == item); // 1

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using System;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        List<string> list = new List<string> { "A1", "A2", "B1" };
        string item = "A2";

        bool result = list.Contains(item);

        Console.WriteLine(result); // True
    }
}

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using System;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        List<string> list = new List<string> { "A1", "A2", "B1" };
        string search = "A2";

        int result = list.IndexOf(search);

        Console.WriteLine(result); // 1
    }
}

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using System;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        List<string> list = new List<string> { "A1", "A2", "B1" };
        string item = "A2";

        int result = list.FindIndex(x => x == item); // 1

        Console.WriteLine(result);
    }
}