c# merge and sort two array

using System;

using System.Collections.Generic;

using System.Text;

namespace mergsortarray

{

    class Program

    {

        static void Main(string[] args)

        {

            int i, j, t = 0;

            Console.WriteLine("enter size of 1st array");

            int n1=Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("enter size of 2nd array");

            int n2 = Convert.ToInt32(Console.ReadLine());

            int n3 = n1 + n2;

            int[] a = new int[n1];

            int[] b = new int[n2];

            int[] c = new int[n3];

            Console.WriteLine("enter "+n1+ "int value for  1st  array");

            for (i = 0; i < n1; i++)

            {

                a[i] = Convert.ToInt32(Console.ReadLine());

            }

            Console.WriteLine(" enter"+n2+" value for 2nd array");

            for (i = 0; i < n2; i++)

            {

                b[i] = Convert.ToInt32(Console.ReadLine());

            }

            i = 0;

            for (j = 0; j < n3; j++)

                {

                    if (i < n1)

                        c[i] = a[i];

                    else  c[i] = b[j-n1];

                    i++;

                }

                for (j = 0; j < n3; j++)

                {

                    for (i = j; i < n3; i++)

                        if (c[j] >= c[i])

                        {

                            t = c[j];

                            c[j] = c[i];

                            c[i] = t;

                        }

                }

            Console.WriteLine("merge and sorted array");

            for (i = 0; i < n3; i++)

                Console.WriteLine(c[i]);

            Console.ReadLine();

        }

       

    }

}