Sum, Avarage, Maximum, Minimum of odds and evens

i have code with 10 random number, there i have odds and evens so i need to get separately Sum, Avarage, Maximum, Minimum for odds and separately Sum, Avarage, Maximum, Minimum for evens i must use only for cycle **NO VAR!**xD

    namespace ConsoleApp7
{
    class Program
    {
        static void Main(string[] args)
        {
            Random r = new Random();
            int[] array = new int[10];
            for (int i = 0; i < array.Length; i++)
            {
                array[i] = r.Next(100);
                bool even;
                if (array[i] % 2 == 0)
                {
                    even = true;
                }
                else
                {
                    even = false;
                }
                Console.Write("array[" + i + "] = " + array[i]);

                if (even == true)
                {
                    Console.WriteLine(" is even");
                }
                else
                {
                    Console.WriteLine(" is odd");
                }

            }
            Console.ReadKey();
        }
    }
}