i need out put like this in c#

        int k = 1;

        for (int i = 1; i < 5; i++)

        {

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

            {

                Response.Write(k);

                k += 1;

            }

            Response.Write("</br>");

        }

 

       for (int i = 1; i < 5; i++)

        {

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

            {

                Response.Write("*");

            }

            Response.Write("</br>");

        }

        for (int x = 4; x >1; x--)

        {

            for (int y = 1; y < x; y++)

            {

                Response.Write("*");

            }

            Response.Write("</br>");

        }

int count = 1;

            int i = 1;

            string strOutput=null;



            do

            {

                switch (count)

                {

                    case 1:

                        strOutput = i.ToString();

                        count = 2;

                        i++;

                        break;



                    case 2:

                        strOutput += "\r\n" + i.ToString() + "\t" + (i + 1).ToString();

                        count = 3;

                        i = i + 2;

                        break;



                    case 3:

                        strOutput += "\r\n" + i.ToString() + "\t" + (i + 1).ToString() + "\t" + (i + 2).ToString();

                        count = 4;

                        i = i + 3;

                        break;



                    case 4:

                        strOutput += "\r\n" +  i.ToString() + "\t" + (i + 1).ToString() + "\t" + (i + 2).ToString() + "\t" + (i + 3).ToString();

                        count = 5;

                        i = i + 4;

                        break;



                    default:

                        break;

                }



            } while (i <= 10);

            MessageBox.Show(strOutput);