Beginner's Code for Diamond Pattern

using System;

public class Test
{
      public static void Main()
      {
            var n = Console.ReadLine();
            int no = Convert.ToInt32(n);
            Pattern print = new Pattern();
            print.Diamond(no);
      }
}
public class Pattern
{
      public void Diamond(int n)
      {
            int m = n*2;
           
            int dummy=n;
            for(int i=0;i<=m;i++)
            {
                  if(i<n)
                  {
                        dummy --;
                  }
                  else
                  {
                        if(i==n)
                        {
                              dummy=dummy;
                        }
                        else
                        {
                        dummy++;
                        }
                  }
                  for(int j=0;j<n;j++)
                  {
                        if(j<dummy)
                        {
                              Console.Write(" ");
                        }
                        else
                        {
                              Console.Write("* ");
                        }
                  }
                  Console.WriteLine();
            }
      }
}

3

 stdout

Please Enter n:3


    * 


  *  * 


*  *  * 


*  *  * 


  *  * 


    *