Print_Triangle

using System;

class Triangle
{
    static void PrintLine(int start, int end)
    {
        for (int i = start; i <= end; i++)
        {
            Console.Write(i + " ");
        }
        Console.WriteLine();
    }
    static void PrintTriangle(int n)
    {
        for (int line = 1; line <= n; line++)
        {
            PrintLine(1, line);
        }
        for (int line = n - 1; line >= 1; line--)
        {
            PrintLine(1, line);
        }
    }
    static void Main()
    {
        Console.Write("Enter n: ");
        int n = int.Parse(Console.ReadLine());

        PrintTriangle(n);

    }
}