ขอความช่วยเหลือ C# เกี่ยวกับ do while การหาavg min - max รบกวนทีครับ

using System;
namespace Mounova
{
    class Chanatza
    {
        static void Main()
        {
            int i, n, num, sum = 0, avg = 0, min, max;
          
            
            Console.Write("How many number you put: ");
            num = int.Parse(Console.ReadLine());
            i = 1;
            
            do
            {
                Console.Write("Input your values: ");
                n = int.Parse(Console.ReadLine());
                
                sum = sum + n;
                avg = sum / num;
                min = Math.Min(n, n);
                max = Math.Max(n, n);
                i = i + 1;
                
                
                
            } while (i <= num);
            Console.WriteLine("---------------------------------------");
            Console.WriteLine("Avg of number is: {0}", avg);
            Console.WriteLine("Min of your number to input is: {0}", min);
            Console.WriteLine("Max of your number to input is: {0}", max);
            
            
            
            Console.ReadLine();
        }
    }
}

using System;
namespace Mounova
{
    class Chanatza
    {
        static void Main()
        {
            double i, n, num, sum = 0, avg = 0, min, max;
          
            
            Console.Write("How many number you put: ");
            num = double.Parse(Console.ReadLine());
            i = 1;
            
            do
            {
                Console.Write("Input your values: ");
                n = double.Parse(Console.ReadLine());
                
                sum = sum + n;
                avg = sum / num;
                min = Math.Min(n, n);
                max = Math.Max(n, n);
                i = i + 1;
                
                
                
            } while (i <= num);
            Console.WriteLine("---------------------------------------");
            Console.WriteLine("Avg of number is: {0}", avg);
            Console.WriteLine("Min of your number to input is: {0}", min);
            Console.WriteLine("Max of your number to input is: {0}", max);
            
            
            
            Console.ReadLine();
        }
    }
}

using System;
namespace Mounova
{
class Chanatza
{
static void Main()
{
double i, n, num, sum = 0;
double avg = 0;
double min = 0;
double max = 0;


Console.Write("How many number you put: ");
num = double.Parse(Console.ReadLine());
i = 1;

do
{
Console.Write("Input your values: ");
n = double.Parse(Console.ReadLine());

sum = sum + n;
avg = sum / num;

if(max < n){
max = n;
}

i = i + 1;



} while (i <= num);
Console.WriteLine("---------------------------------------");
Console.WriteLine("Avg of number is: {0}", avg);
Console.WriteLine("Min of your number to input is: {0}", min);
Console.WriteLine("Max of your number to input is: {0}", max);



Console.ReadLine();
}
}
}