Problem with Floyd's Triangle (c#)

This is my code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace HelloWorld
{
	public class Program
	{
		public static void Main(string[] args)
		{
			int rows = Convert.ToInt32(Console.ReadLine()); //get the amount of rows to draw
			
			int row = 1; //the row that we are currently working on
			int num = 1; //the number that we are currently writing
			
			while(row <= rows) //run while we have not written all rows
			{
			  int i = 0; //how many times we've iterated
			  
			  while(i < row) //run once for each number in row
			  {
			    Console.Write($"{num} "); //write the number
			    
			    num++; //next number
			    i++; //iterate once
			  }
			  
			  Console.Write("\n"); //start the next level of the triangle
			  
			  row++; //iterate the row that we are writing
			}
		}
	}
}

It prints the triangle:

1 
2 3 
4 5 6 
7 8 9 10 
11 12 13 14 15 
16 17 18 19 20 21 
22 23 24 25 26 27 28 
29 30 31 32 33 34 35 36 
37 38 39 40 41 42 43 44 45 
46 47 48 49 50 51 52 53 54 55 

But when I submit, it says, "0/1 Test Cases"
Does anyone know what I'm doing wrong?