// PUT api/ProjectMember/5
        public HttpResponseMessage PutProjectMember(int id, ProjectMember projectmember)
        {
            if (ModelState.IsValid)
            {
                db.Entry(projectmember).State = EntityState.Modified;

                try
                {
                    db.SaveChanges();
                }
                catch (DbUpdateConcurrencyException)
                {
                    return Request.CreateResponse(HttpStatusCode.NotFound);
                }

                return Request.CreateResponse(HttpStatusCode.OK);
            }
            else
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }
        }
        // POST api/ProjectMember
        public HttpResponseMessage PostProjectMember(ProjectMember projectmember)
        {
            if (ModelState.IsValid)
            {
                db.Configuration.ProxyCreationEnabled = false;
                var query = from pm in db.ProjectMembers
                            where pm.ProjectID == projectmember.ProjectID
                            select pm;

                if (query.ToList().FirstOrDefault(p => p.UserID == projectmember.UserID) != null)
                {
                    return Request.CreateResponse(HttpStatusCode.BadRequest);
                }

                db.ProjectMembers.Add(projectmember);
                db.SaveChanges();
                db.Configuration.ProxyCreationEnabled = false;
                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, projectmember);
                response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = projectmember.ProjectID }));
                return response;
            }
            else
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }
        }