Simple Console Application to show how to access private fields and their values through Reflection using C#.

Program.cs

using System;
using System.Globalization;
using System.Reflection;

namespace TestingReflection
{
    public class Program
    {
        static void Main(string[] args)
        {
            var calculator = new CostCalculator();
            var finalprice = calculator.CalculateFinalPrice(30);
            Console.WriteLine($"Final Price: {finalprice.ToString(CultureInfo.InvariantCulture)}");
            var calc = typeof(CostCalculator);
            var fields = calc.GetFields(BindingFlags.FlattenHierarchy|BindingFlags.NonPublic|BindingFlags.Public|BindingFlags.Static|BindingFlags.Instance);

            foreach (var field in fields)
            {
                Console.WriteLine($"Field: {field.Name} - Value: {field.GetValue(calculator)}");
            }
        }
    }

    public class CostCalculator
    {
        private readonly double _conversionFactor = 0.123;
        private readonly int _fixedProfit = 10;

        public double CalculateFinalPrice(int costToProduce)
        {
            return _conversionFactor * costToProduce + _fixedProfit;
        }
    }
}