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C# Entity Framework Basics LINQ Queries Sorting a Query

Why not passing? Please take a quick look:

Here is my error:

Repository.cs(14,30): error CS1525: Unexpected symbol `.' Compilation failed: 1 error(s), 0 warnings

There isn't a "." to remove... I am totally confused. Thanks for the help.

Course.cs
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;

namespace Treehouse.CodeChallenges
{
    public class Course
    {
        public Course()
        {
            Students = new List<CourseStudent>();
        }

        public int Id { get; set; }
        public int TeacherId { get; set; }
        [Required, StringLength(200)]
        public string Title { get; set; }
        public string Description { get; set; }
        public int Length { get; set; }

        public Teacher Teacher { get; set; }
        public ICollection<CourseStudent> Students { get; set; }
    }
}
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.ToList();
                              .OrderBy(c => c.Teacher.LastName)
                              .ThenBy(c => c.Teacher.FirstName);
            }
        }

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

Steven Parker
Steven Parker
230,233 Points

The unexpected period is the one before "OrderBy", and that's because the previous line ends with a semicolon, making the period the beginning of a new statement.

In addition to removing the semicolon, you'll also want to do the conversion to a list after the LINQ methods. Look at the implementation of "GetCoursesByTeacher" for an example.