Clight_37_MergeCollection

class Program
{
    static void Main()
    {
        int[] firstNumbers;
        int[] secondNumbers;
        int arrayLength = 5;
        int minNumber = 1;
        int maxNumber = 9;

        List<int> numbers = new List<int>();

        firstNumbers = GetRandomArray(arrayLength, minNumber, maxNumber);
        ShowNumbers(firstNumbers, "Первый массив:");

        secondNumbers = GetRandomArray(arrayLength, minNumber, maxNumber);
        ShowNumbers(secondNumbers, "Второй массив:");

        AddUniqueElements(numbers, firstNumbers);
        AddUniqueElements(numbers, secondNumbers);
        ShowNumbers(numbers, "итоговая коллекция:");
    }

    static void AddUniqueElements(List<int> numbers, int[] array)
    {
        foreach (int number in array)
        {
            if (numbers.Contains(number) == false)
            {
                numbers.Add(number);
            }
        }
    }

    static int[] GetRandomArray(int length, int minValue, int maxValue)
    {
        Random random = new Random();

        int[] array = new int[length];

        for (int i = 0; i < array.Length; i++)
        {
            array[i] = random.Next(minValue, maxValue + 1);
        }

        return array;
    }

    static void ShowNumbers(int[] array, string descriprion)
    {
        Console.WriteLine(descriprion);

        for (int i = 0; i < array.Length; i++)
        {
            Console.Write($"{array[i]} ");
        }

        Console.WriteLine();
    }

    static void ShowNumbers(List<int> numbers, string descriprion)
    {
        Console.WriteLine(descriprion);

        for (int i = 0; i < numbers.Count; i++)
        {
            Console.Write($"{numbers[i]} ");
        }
    }
}