Начало, создала сущности, перечисления. не до конца

ProjectPolyclinic/ProjectPolyclinic/Entities/Diagnosis.cs

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+using ProjectPolyclinic.Entities.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities
+{
+    public class Diagnosis
+    {
+        public int Id { get; private set; }
+        public DiagnosisName DiagnosisName { get; private set; }
+        public static Diagnosis CreateEntity(int id, DiagnosisName diagnosisName)
+        {
+            return new Diagnosis
+            {
+                Id = id,
+                DiagnosisName = diagnosisName
+
+            };
+        }
+
+    }
+}

ProjectPolyclinic/ProjectPolyclinic/Entities/Doctor.cs

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+using ProjectPolyclinic.Entities.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities;
+
+public class Doctor
+{
+    public int Id { get; private set; }
+    public string First_Name { get; private set; } = string.Empty;
+    public string Last_Name { get; private set; } = string.Empty;
+    public Specialization Specialization { get; private set; }
+    public static Doctor CreateEntity(int id, string first_Name, string last_Name, Specialization specialization)
+    {
+        return new Doctor
+        {
+            Id = id,
+            First_Name = first_Name ?? string.Empty,
+            Last_Name = last_Name ?? string.Empty,
+            Specialization = specialization
+        };
+    }
+}

ProjectPolyclinic/ProjectPolyclinic/Entities/Enums/DiagnosisName.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities.Enums;
+
+public enum DiagnosisName
+{
+    None = 0,
+    Flu = 1,
+    Fracture = 2,
+    Asthma = 3,
+    SkinInfection = 4,
+    HeartDisease = 5
+}

ProjectPolyclinic/ProjectPolyclinic/Entities/Enums/MedicinesType.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities.Enums;
+
+[Flags]
+public enum MedicinesType
+{
+    None = 0,
+
+    Aspirin = 1,
+
+    Ibuprofen = 2,
+
+    Synopret = 4,
+
+    Pentalginum = 8,
+
+    Paracetamol= 16
+}

ProjectPolyclinic/ProjectPolyclinic/Entities/Enums/Specialization.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities.Enums;
+
+public enum Specialization
+{
+    None = 0,
+    GeneralPractitioner = 1,         // Терапевт - Грипп
+    Surgeon = 2,                 // Хирург - Перелом
+    Pediatrician = 3,              // Педиатр - Астма
+    Dermatologist = 4,      // Дерматолог - Кожная инфекция
+    Cardiologist = 5
+}

ProjectPolyclinic/ProjectPolyclinic/Entities/Medicines.cs

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+using ProjectPolyclinic.Entities.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities;
+
+public class Medicines
+{
+    public int Id { get; private set; }
+    public MedicinesType MedicinesType { get; private set; }
+    public int Dosing { get; private set; }
+    public static Medicines CreateElement(int id,MedicinesType medicinesType,int dosing)
+    {
+        return new Medicines
+        {
+            Id = id,
+            MedicinesType = medicinesType,
+            Dosing = dosing
+        };
+    }
+}

ProjectPolyclinic/ProjectPolyclinic/Entities/Medicines_Visiting.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities;
+
+public class Medicines_Visiting
+{
+
+}

ProjectPolyclinic/ProjectPolyclinic/Entities/Patient.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities
+{
+    public class Patient
+    {
+        public int Id { get;private set; }
+        public string First_Name { get; private set; } = string.Empty;
+        public string Last_Name { get; private set; } = string.Empty;
+        public DateTime Date_Of_Birth { get; private set; }
+        public static Patient CreateEntity(int id, string first_Name, string last_Name, DateTime date_of_birth)
+        {
+            return new Patient
+            {
+                Id = id,
+                First_Name = first_Name,
+                Last_Name = last_Name,
+                Date_Of_Birth = date_of_birth
+            };
+        }
+    }
+}

ProjectPolyclinic/ProjectPolyclinic/Entities/Visiting.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Entities;
+
+public class Visiting
+{
+    public int Id { get; private set; }
+    public int DoctorId { get; private set; }
+    public int PatientId { get; private set; }
+    public int DiagnosisId { get; private set; }
+    public DateTime VisitingTime { get; private set; }
+    public static Visiting CreateOperation(int id, int doctorId, int patientId, int diagnosisId, DateTime visitingTime)
+    {
+        return new Visiting
+        {
+            Id = id,
+            DoctorId = doctorId,
+            PatientId = patientId,
+            DiagnosisId = diagnosisId,
+            VisitingTime = visitingTime
+        };
+    }
+}