Lottery games with C# in console applicatin

class Program
    {
        private static void InitArray()
        {
            int[] arr = new int[7];
            Random rnd = new Random();
            int tmp;

            for (int i = 0; i < arr.Length; i++)
            {
                tmp = rnd.Next(1, 39);
                while (IsDup(tmp,arr))
                {
                    tmp = rnd.Next(1, 39);
                }
                arr[i] = tmp;
            }           
            PrintTheArray(arr);
        }
        private static void PrintTheArray(int[] arr)
        {
            foreach (var item in arr)
            {
                Console.WriteLine(item);
            }
        }
        private static bool IsDup(int tmp, int[] arr)
        {
            foreach (var item in arr)
            {
                if(item==tmp)
                {
                    return true;
                }
            }
            return false;
        }


        static void Main(string[] args)
        {
                
                //User Input
                List<int> lista1 = new List<int>();
            for (int i = 1; i <= 7; i++)
            {
                try
                {
                    Console.Write("First Number {0}: ", i);
                    int x = Convert.ToInt16(Console.ReadLine());

                    lista1.Add(x);
                }
                catch (Exception ex)
                {
                    Console.WriteLine("The input number is incorret! It has to be whole number");
                    Console.WriteLine("Error: {0}", ex.Message);
                    i--;
                }
            }
            Console.WriteLine("\nChoosen Numbers are: ");
            foreach (int item in lista1)
            {
                Console.WriteLine(item);
            }

            //Random Number Generator
            Console.WriteLine("Random Numbers are: ");
            InitArray();
            Console.ReadLine();
        }