Засунул всю логику в отдельную папку

Hotel/HotelBusinessLogic/BusinessLogics/BookingLogic.cs

@@ -10,7 +10,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace HotelBusinessLogic
+namespace HotelBusinessLogic.BusinessLogics
 {
     public class BookingLogic : IBookingLogic
     {

Hotel/HotelBusinessLogic/BusinessLogics/ClientLogic.cs

@@ -9,7 +9,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace HotelBusinessLogic
+namespace HotelBusinessLogic.BusinessLogics
 {
     public class ClientLogic : IClientLogic
     {

Hotel/HotelBusinessLogic/BusinessLogics/PostLogic.cs

@@ -9,7 +9,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace HotelBusinessLogic
+namespace HotelBusinessLogic.BusinessLogics
 {
     public class PostLogic : IPostLogic
     {
@@ -88,7 +88,7 @@ namespace HotelBusinessLogic
             {
                 throw new ArgumentNullException("Нужно заполнить поле должности", nameof(model.PostName));
             }
-         
+
 
         }
     }

Hotel/HotelBusinessLogic/BusinessLogics/RoomLogic.cs

@@ -9,7 +9,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace HotelBusinessLogic
+namespace HotelBusinessLogic.BusinessLogics
 {
     public class RoomLogic : IRoomLogic
     {

Hotel/HotelBusinessLogic/BusinessLogics/WorkerLogic.cs

@@ -9,7 +9,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace HotelBusinessLogic
+namespace HotelBusinessLogic.BusinessLogics
 {
     public class WorkerLogic : IWorkerLogic
     {