C#: Find the maximum key from a dictionary

Yesterday a person asked on the forums on how to find the maximum key from a dictionary. He needs to perform some logic after finding the maximum key so I gave him the solution to use Max of LINQ. Below is the code for it :

#region Using Directives

using System;
using System.Collections.Generic;
using System.Linq;

#endregion

public class Example
{
    class Test
    {
        static void Main()
        {
            var dictionary = new Dictionary<int, string>
                                 {{1, "one"}, {2, "two"}, {3, "three"}, {4, "four"},
                                 };
            var maxKey = dictionary.Max(x => x.Key);
            Console.WriteLine(maxKey);
            Console.ReadLine();

        }
    }
}

Above I have used a dummy dictionary, added few records in it. Then I have used the "Max" extension on "dictionary" object in order to extract the maximum key from it.

Do let me know your feedback, comments.