What am i doing wrong here? Building services with ASP.NET Web API

using System.Collections.Generic;
using System.Web.Http;
using IssueTrackerShared.Models;

namespace IssueTracker.Controllers
{
    public class IssuesController : ApiController
    {
        public IEnumerable<Issue> Get()
        {
            return new List<Issue>()
            {

                new Issue(2017, 10, 5, "Metallica", "trump@whitehouse.com", new Department() {Name = "kalle"}, "I have huge problemos", Issue.SeverityLevel.Major, false),
                new Issue(2016, 09, 5, "DeaThIsNear", "trump@whitehouse.com", new Department() {Name = "kalle"}, "I have huge problemos", Issue.SeverityLevel.Major, false)
            };
        }

        public Issue Get(int id)
        {
            return null;
        }

        public void Post()
        {
        }

        public void Put()
        {
        }

        public void Delete()
        {
        }
    }
}