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C# Entity Framework Basics CRUD Operations Deleting an Entity

Deleting an Entity:

Feel like I'm close...

Repository.cs(63,43): error CS1922: A field or property Treehouse.CodeChallenges.Course' cannot be initialized with a collection object initializer because typeTreehouse.CodeChallenges.Course' does not implement `System.Collections.IEnumerable' interface Compilation failed: 1 error(s), 0 warnings

Repository.cs
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;

namespace Treehouse.CodeChallenges
{
    public static class Repository
    {
        public static List<Course> GetCourses()
        {
            using (var context = new Context())
            {
                return context.Courses
                              .OrderBy(c => c.Teacher.LastName)
                              .ThenBy(c => c.Teacher.FirstName)
                              .ToList();
            }
        }

        public static List<Course> GetCoursesByTeacher(string lastName)
        {
            using (var context = new Context())
            {
                return context.Courses
                              .Where(c => c.Teacher.LastName == lastName)
                              .ToList();
            }
        }

        public static Course GetCourse(int id)
        {
            using (var context = new Context())
            {
                return context.Courses
                              .Include(c => c.Teacher)
                              .SingleOrDefault(c => c.Id == id);
            }
        }

        public static void AddCourse(Course course)
        {
            using (var context = new Context())
            {
                context.Courses.Add(course);
                context.SaveChanges();
            }
        }

        public static void UpdateCourse(Course course)
        {
            using (var context = new Context())
            {
                context.Courses.Attach(course);
                context.Entry(course).State = EntityState.Modified;
                context.SaveChanges();
            }
        }

        public static void DeleteCourse(int id)
        {
            using (var context = new Context())
            {
                var course = new Course() { Id == id };
                context.Entry(course).State = EntityState.Deleted;

                context.SaveChanges();
            }
        }
    }
}

2 Answers

Steven Parker
Steven Parker
231,198 Points

You're certainly close, you just have one wrong symbol.

When you established your stub and set up the Id, you used a comparison operator ("==") instead of an assignment operator ("=").

Thank you sir!