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CSharp · Console

/Program.cs

using System;
using System.Linq;
					
public class Program
{
	public static void Main()
	{
		Console.WriteLine(String.Join(",",twodigi(10)));
	}
	public static int[] twodigi(int number)
    {
        Random random = new Random();    
        int[] a = new int[number];
		for (int i = 0; i < number; i++)
        {         
            a[i] = random.Next(10, 100);
        }

          return a.GroupBy(v => v).Select(x=> x.Key + x.Count()).ToArray();
    }
}