using System;

using System.Collections.Generic;

public class Program

{

    public static List<int> randomList = new List<int>();

    public static  Random a = new Random(); // replace from new Random(DateTime.Now.Ticks.GetHashCode());

    static int MyNumber = 0;

    public static void Main()

    {

        while(randomList.Count <= 9){

            MyNumber = a.Next(1, 11);

​

            if (!randomList.Contains(MyNumber)){

                                    //  Console.WriteLine(randomList.Count);

​

            randomList.Add(MyNumber);

            }

        //NewNumber();

        }

        foreach( var lst in randomList)

        {

            Console.WriteLine(lst);

    }

    }   

    public static void NewNumber()

    {

        MyNumber = a.Next(1, 11);

        if (!randomList.Contains(MyNumber))

            randomList.Add(MyNumber);

    }

}