---

using System;

public class Test
{
  public static void Main()
  {
    int[] numbers = new int[10] {5, 1, -3, 9, 4, -30, 25, -7, 11, -17};
    int chislo = 0;
    for (int i = 0; i < 10; i++)
    {
        chislo = numbers[i];
        for (int j = 0; j < 9; j++)
        {
           if (numbers[j+1] < numbers[j])
           {
               chislo = numbers[j];
               numbers[j] = numbers[j+1];
               numbers[j+1] = chislo;
           }

        }
    }
    for (int n = 0; n < 10; n++)
    {
        Console.WriteLine(numbers[n]);
    }
  }
}using System;

public class Test
{
    static void polindrom(int[] arr)
    {
//arr.Length-определение длинны массива
        int n = arr.Length;
        int count = 0;
        for (int i = 0; i < n / 2; i++)
        {
            // Сравниваем элементы с двух концов массива
            if (arr[i] == arr[n - 1 - i])
            {
                count++;
            }
        }

        if (count == n / 2)
        {
            Console.WriteLine("true");
        }
        else
        {
            Console.WriteLine("false");
        }
    }

    public static void Main()
    {
        int[] numbers = { 5, 1, -3, 1, 5 };
        int[] numbers2 = { 5, 1, -3, 9, 4, 9 }; 
        int[] numbers3 = { 5, 1, -3, 9, 4, -30, 2 }; 

        Console.Write("numbers: ");
        polindrom(numbers);

        Console.Write("numbers2: ");
        polindrom(numbers2);

        Console.Write("numbers3: ");
        polindrom(numbers3);
    }
}