Beginner's BUTTERFLY PATTERN

PRINT BUTTERFLY PATTERN USING C#

using System;

public class Test
{
public static void Main()
{
var no = Console.ReadLine();
int n = Convert.ToInt32(no);
Pattern print = new Pattern();
print.Butterfly(n);
}
}

public class Pattern
{
public void Butterfly(int n)
{
  int totalNoofStars = n*2;
  int lefttriangle = 1;
  int righttriangle = totalNoofStars;
  for(int i=1;i<=totalNoofStars;i++)
  {
  if(i<=n)
  {
  lefttriangle++;
  righttriangle--;
  }
  else
  { 
  if(i==n+1)
  {
  lefttriangle= lefttriangle;
  righttriangle = righttriangle;
  }
  else
  {
  lefttriangle--;
  righttriangle++;
  }
  }
  for(int j=1;j<=totalNoofStars;j++)
  {
  if(j<lefttriangle || j> righttriangle)
  {
  Console.Write("*");
  }
  else
  {
  Console.Write(" ");
  }
  }
  Console.WriteLine();
  }
  }
}