int[] massiv = new int[20];
int[] massiv1 = new int[20];
Console.WriteLine("Массив");
Random rand = new Random();
for (int i = 0; i < 20; i++)
massiv[i] = rand.Next(1,20);
Console.Write(massiv[i] + " ");
for (int i = 0; i < 20; i++)
Console.Write(massiv1[i] + " ");