Easy csharp

HashSet — remove duplicates #15

Problem

Store unique numbers in HashSet.

Hints

new HashSet<int>

Your practice code

Ready — edit the code above and click Run.

Solution

using System;

class Program
{
    static void Main()
    {
        using System.Collections.Generic;
        var set = new HashSet<int> { 1, 2, 2, 3 };
        Console.WriteLine(set.Count);
    }
}

Try solving on your own first, then reveal the official answer.

Explanation

HashSet enforces uniqueness automatically.

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