View difference between Paste ID: Pva9XvZ1 and C26sWULh

 using System;
 
 namespace C_sharp_Light
 {
     class Program
     {
         static void Main(string[] args)
         {
-
+            int[] array = new int[0];
             string command;
             bool isOpen = true;
 
             while (isOpen)
             {
                 Console.Clear();
                 Console.WriteLine("Числа в памяти:");
                 foreach (var number in array)
                 {
                     Console.Write(number + " ");
                 }
                 Console.Write("\n\nВведите или число, или команды sum, exit - ");
                 command = Console.ReadLine();
 
                 switch (command)
                 {
                     case "sum":
                         int sum = 0;
                         foreach (var number in array)
                         {
                             Console.Write(number + "+");
                             sum += number;
                         }
                         Console.SetCursorPosition(Console.CursorLeft - 1, Console.CursorTop);
                         Console.Write("=" + sum);
                         break;
                     case "exit":
                         isOpen = false;
                         break;
                     default:
                         int temp = Convert.ToInt32(command);
                         int[] tempArray = new int[array.Length + 1];
                         for (int i = 0; i < array.Length; i++)
                         {
                             tempArray[i] = array[i];
                         }
                         array = tempArray;
                         array[array.Length - 1] = temp;
                         break;
                 }
                 Console.ReadKey();
             }
         }
     }
 }