using System;
using System.Linq;
int[] numbers = { 1, 2, 3, 4, 5 };
var max = numbers.Max();
//max is 5
var max5 = numbers
.Max(n => n * 5);
//max5 is 25
var names = new[] {
"Max", "Boris", "Alex"
};
var maxLength = names
.Max(s => s.Length);
//maxLength is 6
Console.WriteLine(max);
Console.WriteLine(max5);
Console.WriteLine(maxLength);