List Dynamical

using System;
using System.Collections.Generic;

namespace ListDynamical
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("\nType 'exit' for - Exit\nType 'sum' for - Get sum of array elements");
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("_______________________");
            Console.ResetColor();
            Console.WriteLine("Input array: ");

            int sum = 0;
            List<int> expansionArray = new List<int>();

            while (true)
            {
                string inputCommand = Console.ReadLine();
                

                if (inputCommand == "exit")
                {
                    break;
                }
                else if (inputCommand == "sum")
                {               
                    Console.WriteLine("Sum of array " + sum);
                }
                else 
                {             
                    int inputNumberCommand;

                    if (int.TryParse(inputCommand, out inputNumberCommand))
                    {

                        expansionArray.Add(inputNumberCommand);

                        sum += expansionArray[expansionArray.Count - 1];
                        

                    }
                    else
                    {
                        Console.WriteLine("Not correct value");
                    }
                    
                }
            }
        }
    }
}