using System;
namespace ConsoleApp10
{
    public class RemoveDuplicatesSort
    {
        public void Remove(int[] array)
        {
            if (array == null)
            {
                throw new ArgumentException("Array is empty");
            }
            Array.Sort(array);
            int j = 0;
            for (var i = 0; i < array.Length; i++)
            {
                if (i == array.Length - 1 || array[i] != array[i + 1])
                {
                    array[j++] = array[i];
                }
            }
            while (j < array.Length)
            {
                array[j++] = -1;
            }
        }
    }
}