Generic methods

using System;
using System.Linq;
//Write methods to calculate minimum, maximum, average, sum and product of given set of integer numbers. Use variable number of arguments.
//Modify your last program and try to make it work for any number type, not just integer (e.g. decimal, float, byte, etc.).
class GenericMethods
{
    static void Main()
    {
        dynamic min;
        min = CalcMin(1,2,3,4);
        Console.WriteLine("Min value is: {0}", min);

        dynamic max;
        max = CalcMax(0.2,4,-0.56,5.67);
        Console.WriteLine("Max value is: {0}", max);

        dynamic average;
        average = CalcAverage(10000,29999999,1,-45677.0234234);
        Console.WriteLine("Average value is: {0}", average);

        dynamic sum;
        sum = CalcSum(2,4,6,7);
        Console.WriteLine("Sum is: {0}", sum);

        dynamic product;
        product = CalcProduct(1,2,3,4,-5.354);
        Console.WriteLine("Product is {0}", product);
    }

    private static T CalcProduct<T>(params T[] num)
    {
        dynamic product = 1;
        for (int i = 0; i < num.Length; i++)
        {
            product *= num[i];
        }
        return product;
    }

    private static T CalcAverage<T>(params T[] num)
    {
        dynamic sum = 0;
        for (int i = 0; i < num.Length; i++)
        {
            sum += num[i];
        }
        return sum/num.Length;
    }

    private static T CalcSum<T>(params T[] num)
    {
        dynamic sum = 0;
        for (int i = 0; i < num.Length; i++)
        {
            sum += num[i];
        }
        return sum;
    }

    private static T CalcMax<T>(params T[] num)
    {
        return num.Max();
    }

    private static T CalcMin<T>(params T[] num)
    {
        return num.Min();
    }
}