Программа не видит переменные - C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace ConsoleApplication3
{
    class Program
    {
        static void Main(String[] args)
        {
  
            int[] c = { 3, 1, 10, 3, 2, 44, 3 };
            double result = (c.Where((elem, index) => (minIndex < maxIndex) ? index > minIndex && index < maxIndex : index > maxIndex && index < minIndex)).Sum();
            Console.WriteLine(result);
            Console.ReadKey();
        }
 
        private static int GetMax(int[] c)
        {
 
            int maxIndex = Array.IndexOf(c, c.Max());
            return maxIndex;
        }

        private static int GetMin(int[] c)
        {
            int minIndex = Array.IndexOf(c, c.Min());
            return minIndex;
        }
    }
}