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

Posted by Mohamed Monir
Mohamed Monir
22,362 Points

i use inherits but i don't know what error how to base initialize

i write all Role in inheritance Polygon to Square but i don't know what's Rong

Polygon.cs 
namespace Treehouse.CodeChallenges
{
    class Polygon
    {
        public readonly int NumSides;

        public Polygon(int numSides)
        {
            NumSides = numSides;
        }
    }
    class Square : Polygon
    {
        public readonly int SideLength;
        //numSides=4;
        public Square(int sideLength) : base(NumSides)
        {
            //NumSides= NumSides * 4;
        }
    }
}

1 Answer

Jon Wood
Jon Wood
9,884 Points
Jon Wood
Jon Wood
9,884 Points

When you call the base constructor, just use the same parameter you have in your subclass constructor. For example:

class Person
{
  public Person(string personName)
  {

  }
}

class Employee : Person
{
  public Employee(string employeeName): base(employeeName)
  {

  }
}

Hope that helps!