using System;

​

public class Program

{

    public static string[] makeArray()

    {

        Console.WriteLine("What is the size of your array?");

        if (int.TryParse(Console.ReadLine(), out int size) && size >= 0)

        {

            string[] userArray = new string[size];

            for (int i = 0; i < size; i++)

            {

                Console.Write($"Element {i}: ");

                userArray[i] = Console.ReadLine();

            }

            return userArray;

        }

        else

        {

            Console.WriteLine("You made an error.");

            return new string[] { "You made an error." };

        }

    }

    public static void Main()

    {

        Console.WriteLine("Please make two equal sized arrays filled with integers.");

        string[] array1 = makeArray();

        Console.WriteLine("\n\nMake a second array:\n\n");

        string[] array2 = makeArray();

        if (array1.Length == array2.Length)

        {

            bool fullOfInts = true;

            int[] array3 = new int[array1.Length * 2];

            for (int i = 0; i < (array1.Length); i++)

            {

                if (!(int.TryParse(array1[i], out array3[i]) && int.TryParse(array2[i], out array3[i + array1.Length])))

                {

                    fullOfInts = false;

                }

            }

            if (fullOfInts)

            {

                int min;

                int minarray = 0;

                int[] array4 = new int[array3.Length];

​

                for (int j = 0; j < array3.Length; j++)

                {

                    min = array3[0];

                    for (int i = 0; i < array3.Length; i++)

                    {

                        if (array3[i] <= min)

                        {

                            min = array3[i];

                            minarray = i;

                        }

                    }

                    array3[minarray] = 2147483647;

                    array4[j] = min;

                }

                Console.WriteLine("Your sorted combination of arrays is:");

                for (int i = 0; i < array4.Length; i++)

                {

                    Console.WriteLine($"{array4[i]}");

                }

            }

            else

            {

                Console.WriteLine("Please restart the program and fill your arrays with integers.");

            }

        }

        else

        {

            Console.WriteLine("Those arrays are not of the same size.");

        }

    }

}