using System;

public class Program

{

    public static void Main()

    {

        int i,j,space=5,temp=1;

        for(i=0;i<=5;i++)

        {

        for(j=1;j<=space;j++)

          {

            Console.Write(" ");

          }

            for(j=1;j<=i;j++)

            {

                Console.Write(j);

            }

            for(j=i-1;j>0;j--)

            {

                Console.Write(j);

            }

            temp++; 

           space--;

        Console.Write("\n");

        }

        space=1;temp=4;

        for(i=0;i<5;i++)

        {

        for(j=1;j<=space;j++)

        {

            Console.Write(" ");

        }

            for(j=1;j<=temp;j++)

            {

                Console.Write(j);

            }

            for(j=temp-1 ;j>=1;j--)

            {

                Console.Write(j);

            }

            space++;

            temp--;

        Console.Write("\n");

        }

    }

}

​