Изменил сигнатуру метода удаления элемента в интерфейсе логики

Medical/MedicalBusinessLogic/BusinessLogics/DiagnoseLogic.cs

@@ -22,7 +22,7 @@ namespace MedicalBusinessLogic.BusinessLogics
             throw new NotImplementedException();
         }
 
-        public bool Delete(Diagnose model)
+        public bool Delete(int id)
         {
             throw new NotImplementedException();
         }

Medical/MedicalBusinessLogic/BusinessLogics/DoctorLogic.cs

@@ -22,7 +22,7 @@ namespace MedicalBusinessLogic.BusinessLogics
             throw new NotImplementedException();
         }
 
-        public bool Delete(Doctor model)
+        public bool Delete(int id)
         {
             throw new NotImplementedException();
         }

Medical/MedicalBusinessLogic/BusinessLogics/PatientLogic.cs

@@ -22,7 +22,7 @@ namespace MedicalBusinessLogic.BusinessLogics
             throw new NotImplementedException();
         }
 
-        public bool Delete(Patient model)
+        public bool Delete(int id)
         {
             throw new NotImplementedException();
         }

Medical/MedicalBusinessLogic/BusinessLogics/SpecializationLogic.cs

@@ -22,7 +22,7 @@ namespace MedicalBusinessLogic.BusinessLogics
             throw new NotImplementedException();
         }
 
-        public bool Delete(Specialization model)
+        public bool Delete(int id)
         {
             throw new NotImplementedException();
         }

Medical/MedicalBusinessLogic/BusinessLogics/VisitLogic.cs

@@ -22,7 +22,7 @@ namespace MedicalBusinessLogic.BusinessLogics
             throw new NotImplementedException();
         }
 
-        public bool Delete(Visit model)
+        public bool Delete(int id)
         {
             throw new NotImplementedException();
         }

Medical/MedicalDatabaseContracts/ILogic.cs

@@ -13,6 +13,6 @@ namespace MedicalDatabaseContracts
         V? ReadElement(int id);
         bool Create(M model);
         bool Update(M model);
-        bool Delete(M model);
+        bool Delete(int id);
     }
 }