C# Generics

using System;
using System.Collections.Generic;

class Box<T>
{
    private T value;
    public Box(T value) { this.value = value; }
    public T Get() { return value; }
}

class Program
{
    static T Largest<T>(T a, T b) where T : IComparable<T>
    {
        return a.CompareTo(b) >= 0 ? a : b;
    }

    static void Main()
    {
        Console.WriteLine(Largest(3, 9));
        Console.WriteLine(Largest("apple", "banana"));

        Box<int> n = new Box<int>(42);
        Box<string> s = new Box<string>("text");
        Console.WriteLine(n.Get() + " " + s.Get());

        List<double> prices = new List<double> { 4, 8 };
        Console.WriteLine(prices.Count);
    }
}

9
banana
42 text
2