REST API Example built with ASP.NET MVC 4

Program.cs

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;

namespace api_v1_csharp.Models.academics
{
    public class Program
    {
        public int id { get; set; }
        public string name { get; set; }
        public string type { get; set; }
        public bool isThinkpad { get; set; }
        public string shortName { get; set; }
        public bool isNorwich { get; set; }
        public int year { get; set; }
        public int schoolId { get; set; }
        public bool isHidden { get; set; }
        public string requirements { get; set; }
        public string imgPath { get; set; }
        public string programChair { get; set; }
        public string folder { get; set; }
        public string thumbImgPath { get; set; }
        
        // navigation property
        public School school { get; set; }
    }
}

ProgramRepository.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace api_v1_csharp.Models.academics
{
    public class ProgramsRepository : IProgramsRepository
    {
        private AcademicsDbContext db = new AcademicsDbContext();

        public Program GetProgram(int id)
        {
            try
            {
                Program program = db.Programs.Include("school").Single(p => p.id == id);

                return program;
            }
            catch (Exception ex)
            {
                return null;
            }
        }

        public IEnumerable<Program> GetPrograms()
        {
            IQueryable<Program> programs =
                from p in db.Programs.Include("school")
                select p;

            return programs.Any() ? programs : null;
        }
    }
}

ProgramsController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using api_v1_csharp.Models.academics;

namespace api_v1_csharp.Controllers
{
    public class ProgramsController : ApiController
    {
        static readonly IProgramsRepository _repository = new ProgramsRepository();

        // GET v1/programs/{ id }
        public HttpResponseMessage Get(int id)
        {
            Program program = _repository.GetProgram(id);

            if (program == null)
            {
                var message = string.Format("Program with id = {0} not found", id);
                HttpError err = new HttpError(message);
                return Request.CreateResponse(HttpStatusCode.NotFound, err);
            }
            else
            {
                return Request.CreateResponse(HttpStatusCode.OK, program);
            }
        }

        // GET /v1/programs
        public HttpResponseMessage GetPrograms()
        {
            IEnumerable<Program> programs = _repository.GetPrograms();

            if (programs == null)
            {
                var message = string.Format("Programs not found");
                HttpError err = new HttpError(message);
                return Request.CreateResponse(HttpStatusCode.NotFound, err);
            }
            else
            {
                return Request.CreateResponse(HttpStatusCode.OK, programs);
            }
        }
    }
}