code guidelines

src/Yavsc/ApiControllers/ServiceApiController.cs

@@ -14,7 +14,7 @@ namespace Yavsc.Controllers
     [Route("api/ServiceApi")]
     public class ServiceApiController : Controller
     {
-        private ApplicationDbContext _context;
+        private readonly ApplicationDbContext _context;
 
         public ServiceApiController(ApplicationDbContext context)
         {
@@ -146,4 +146,4 @@ namespace Yavsc.Controllers
             return _context.Services.Count(e => e.Id == id) > 0;
         }
     }
-}
+}