---

int y = 0;
int p = 1;
int n, i;

Console.Write("Введите n: ");
n = Convert.ToInt32(Console.ReadLine());

i = 1;
while (i <= n)
{
    y = y + 2 * i;
    p = p * i * i;
    Console.WriteLine("y" + i + " = " + y + ", p" + i + " = " + p);
    i = i + 1;
}

Console.WriteLine("Сумма y = " + y);
Console.WriteLine("Произведение P = " + p);
Console.ReadKey();