Draw triangle using C#

using System;

public class Program
{
   public static void Main()
  {
     Console.WriteLine("Hello World");
     int i,j,k,l=7,m=8,n,o;
     for(i=0;i<=7;i++)
     {
        for(j=1;j<=l;j++)
        {
            Console.Write(" ");
         }
         Console.WriteLine("/");
        l--;
        for(k=1;k<=m;k++)
        {
           Console.Write(" ");
        }
        Console.WriteLine("\\");
        m++;
        }

        for(i=1;i<=45;i++)
        {
           Console.Write("-");
        }
  }