using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var array = new int[]{ 4,1,5,4,3,1,6,5 };

​

        RemoveRepeated(ref array);

        foreach (var item in array)

            Console.WriteLine(item);

    }

​

    static void RemoveRepeated(ref int[] array)

    {

        array = new HashSet<int>(array).ToArray();

    }

}