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C# Entity Framework Basics Extending Our Entity Data Model Defining and Using a One-to-Many Relationship

Posted by Joe Mackey
Joe Mackey
20,418 Points

A default constructor that initializes the Courses property to an instance of List<Course>

I have been fighting wit this for weeks. What am I doing wrong?

Course.cs 
using System.Collections.Generic; 
namespace Treehouse.CodeChallenges
{
    public class Courses
    {

        public Courses()
        {
            Course = new List<Course>();
        }
        public int Id { get; set; }
        public int  TeacherId {get; set;}
        public string Title { get; set; }
        public string Description { get; set; }
        public int Length { get; set; }
        public  Teacher Teacher { get; set; }
        public ICollection<Courses> Course {get; set; }

    }
}
Teacher.cs 
namespace Treehouse.CodeChallenges
{
    public class Teacher
    {
        public int Id { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
    }
}

1 Answer

Seth Kroger
Seth Kroger
56,413 Points
Seth Kroger
Seth Kroger
56,413 Points

The class in the starting code is called Course but you changed it to Courses and added a property named Course. Instead you should keep the class name the same. Second, the challenge step is asking you to change the code of Teacher.cs (the second tab on the editor), not Course.cs.