using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter 'r' rectangle or 't' for triangle");

        string choice = Console.ReadLine();

         Console.WriteLine("enter size");

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

        string text = "";

    if ( choice == "r")

    {

         for ( int rows = 0; rows < size; rows++)

       {

    for ( int columns = 0; columns < size; columns++)

    { 

        text = text + "*";

    }

​

}

    }

      text = text +"/n";

    Console.WriteLine(text);

​

​

}

​

}