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

Posted by Jesse Richards
Jesse Richards
13,964 Points

Help Please!

What am i doing wrong?

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

    }
}
Teacher.cs 
using System.Collections.Generic;
namespace Treehouse.CodeChallenges
{
    public class Teacher
    {
        public void Teachers()
        {
             Courses = new List<Course>();
        }

        public int Id { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }

        public ICollection<Course> Courses { get; set; }
    }
}
Jesse Richards
Jesse Richards
13,964 Points

Did you initialize the Teacher 'Courses' property in the constructor?

1 Answer

Seth Kroger
Seth Kroger
56,414 Points
Seth Kroger
Seth Kroger
56,414 Points

You have a typo in the constructor name. It should be the exact same name as the class.

Jesse Richards
Jesse Richards
13,964 Points

I tried i keep getting errors?