Search for an element that matches specified predicate, returns the zero-based index within entire List in CSharp

using System;/*from   w  ww  .  j av a2  s .co m*/
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;

class Program
{
    
    
    public static void Main(string[] args)
    {
        
        List<Book> Books = new List<Book>();
        Book b = new Book();
        b.Genre = "Computer";
        
        Books.Add(b);
        
        int ndx = Books.FindIndex(FindComputer);
        Console.WriteLine(ndx);
    }
    private static bool FindComputer(Book bk)
    {

        if (bk.Genre == "Computer")
        {
            return true;
        }else{
            return false;
        }

    }
}

public class Book
{
    public string Genre { get; set; }
}