Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

C# C# Objects Inheritance Inheritance in Code

Brett Studer
Brett Studer
707 Points
Posted by Brett Studer
Brett Studer
707 Points

Why doesn't Console.Write(x is MapLocation) print whether it's true or false in my code?

It's seemingly identical to the instructors code but it as well as the 2 following Console.WriteLines don't indicate True or False:

using System;

namespace TreehouseDefense { class Game { public static void Main() { Map map = new Map(8, 5);

      Point x = new MapLocation(4, 2);

      Point p = x;

      map.OnMap(new MapLocation(0, 0));

      Console.WriteLine(x.DistanceTo(5, 5));

      Console.WriteLine(x is MapLocation);
      Console.WriteLine(x is Point);

      Point point = new Point(0, 0);
      Console.WriteLine(point is MapLocation); 
    }
}

}

Steven Parker
Steven Parker
229,695 Points
Steven Parker
Steven Parker
229,695 Points

I tried your snapshot and all of the messages show up just fine. I got:

3
True
True
why
False

1 Answer

Steven Parker
Steven Parker
229,695 Points
Steven Parker
Steven Parker
229,695 Points

Just a guess, but perhaps your last compile (after adding these lines) was not successful, so you're running an older version of the executable. Also be sure you saved your changes in the editor before re-compiling.

To allow a more thorough analysis and accurate answer, make a snapshot of your workspace and post the link to it.