diff --git a/ProjectPolyclinic/ProjectPolyclinic/Program.cs b/ProjectPolyclinic/ProjectPolyclinic/Program.cs
index 1e56aec..af34591 100644
--- a/ProjectPolyclinic/ProjectPolyclinic/Program.cs
+++ b/ProjectPolyclinic/ProjectPolyclinic/Program.cs
@@ -1,7 +1,11 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
 using ProjectPolyclinic.Repositories;
 using ProjectPolyclinic.Repositories.Implementations;
+using Serilog;
 using Unity;
 using Unity.Lifetime;
+using Unity.Microsoft.Logging;
 namespace ProjectPolyclinic
 {
     internal static class Program
@@ -20,12 +24,24 @@ namespace ProjectPolyclinic
         private static IUnityContainer CreateContainer()
         {
             var container = new UnityContainer();
+            container.AddExtension(new LoggingExtension(CreateLoggerFactory()));
             container.RegisterType<IPatientRepository, PatientRepository>(new TransientLifetimeManager());
             container.RegisterType<IVisitingRepository, VisitingRepository>(new TransientLifetimeManager());
             container.RegisterType<IMedicationRepository, MedicationRepository>(new TransientLifetimeManager());
             container.RegisterType<IProfessionalDevelopmentRepository, ProfessionalDevelopmentRepository>(new TransientLifetimeManager());
             container.RegisterType<IDoctorRepository, DoctorRepository>(new TransientLifetimeManager());
+            container.RegisterType<IConnectionString, ConnectionString>(new TransientLifetimeManager());
             return container;
         }
+        private static LoggerFactory CreateLoggerFactory()
+        {
+            var loggerFactory = new LoggerFactory();
+            loggerFactory.AddSerilog(new LoggerConfiguration()
+                .ReadFrom.Configuration(new ConfigurationBuilder()
+                .AddJsonFile("appsettings.json")
+                .Build())
+                .CreateLogger());
+            return loggerFactory;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectPolyclinic/ProjectPolyclinic/ProjectPolyclinic.csproj b/ProjectPolyclinic/ProjectPolyclinic/ProjectPolyclinic.csproj
index accbdf0..b94bfad 100644
--- a/ProjectPolyclinic/ProjectPolyclinic/ProjectPolyclinic.csproj
+++ b/ProjectPolyclinic/ProjectPolyclinic/ProjectPolyclinic.csproj
@@ -9,7 +9,18 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Dapper" Version="2.1.35" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="Npgsql" Version="9.0.1" />
+    <PackageReference Include="Serilog" Version="4.1.0" />
+    <PackageReference Include="Serilog.Extensions.Logging" Version="8.0.0" />
+    <PackageReference Include="Serilog.Settings.Configuration" Version="8.0.4" />
+    <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
     <PackageReference Include="Unity" Version="5.11.10" />
+    <PackageReference Include="Unity.Microsoft.Logging" Version="5.11.1" />
   </ItemGroup>
 
   <ItemGroup>
@@ -27,4 +38,10 @@
     </EmbeddedResource>
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>
\ No newline at end of file
diff --git a/ProjectPolyclinic/ProjectPolyclinic/Repositories/IConnectionString.cs b/ProjectPolyclinic/ProjectPolyclinic/Repositories/IConnectionString.cs
new file mode 100644
index 0000000..670ccda
--- /dev/null
+++ b/ProjectPolyclinic/ProjectPolyclinic/Repositories/IConnectionString.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Repositories;
+
+public interface IConnectionString
+{
+    public string ConnectionString { get;  }
+}
diff --git a/ProjectPolyclinic/ProjectPolyclinic/Repositories/Implementations/ConnectionString.cs b/ProjectPolyclinic/ProjectPolyclinic/Repositories/Implementations/ConnectionString.cs
new file mode 100644
index 0000000..85190d1
--- /dev/null
+++ b/ProjectPolyclinic/ProjectPolyclinic/Repositories/Implementations/ConnectionString.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectPolyclinic.Repositories.Implementations;
+
+public class ConnectionString : IConnectionString
+{
+    string IConnectionString.ConnectionString =>
+        "Server=localhost, 5432;Database=polyclinic1;Uid=postgres;Password=12345678;";
+}
diff --git a/ProjectPolyclinic/ProjectPolyclinic/Repositories/Implementations/PatientRepository.cs b/ProjectPolyclinic/ProjectPolyclinic/Repositories/Implementations/PatientRepository.cs
index f04e9be..d65aff5 100644
--- a/ProjectPolyclinic/ProjectPolyclinic/Repositories/Implementations/PatientRepository.cs
+++ b/ProjectPolyclinic/ProjectPolyclinic/Repositories/Implementations/PatientRepository.cs
@@ -1,4 +1,8 @@
-using ProjectPolyclinic.Entities;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using ProjectPolyclinic.Entities;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -7,27 +11,108 @@ using System.Threading.Tasks;
 
 namespace ProjectPolyclinic.Repositories.Implementations
 {
-    internal class PatientRepository:IPatientRepository
+    public class PatientRepository:IPatientRepository
     {
+        private readonly IConnectionString _connectionString;
+        private readonly ILogger<PatientRepository> _logger;
+        public PatientRepository(IConnectionString connectionString, ILogger<PatientRepository> logger)
+        {
+            _connectionString = connectionString;
+            _logger = logger;
+        }
         public void CreatePatient(Patient patient)
         {
-
-        }
-        public void DeletePatient(int id)
-        {
-
-        }
-        public Patient ReadPatientById(int id)
-        {
-            return Patient.CreateEntity(0, string.Empty, string.Empty, string.Empty);
-        }
-        public IEnumerable<Patient> ReadPatients()
-        {
-            return [];
+            _logger.LogInformation("Добавление объекта");
+            _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(patient));
+            try
+            {
+                using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+                var queryInsert = @"INSERT INTO Patients (First_Name, Last_Name, ContactNumber) 
+                                VALUES (@First_Name, @Last_Name, @ContactNumber)";
+                connection.Execute(queryInsert, patient);
+            }
+            catch(Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка при добавлении объекта");
+                throw;
+            }
         }
         public void UpdatePatient(Patient patient)
         {
-
+            _logger.LogInformation("Редактирование объекта");
+            _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(patient));
+            try
+            {
+                using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+                var queryUpdate = @"UPDATE Patients SET 
+                                           First_Name = @First_Name,
+                                           Last_Name = @Last_Name,
+                                           ContactNumber = @ContactNumber
+                                           WHERE Id=@id";
+                connection.Execute(queryUpdate, patient);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка при добавлении объекта");
+                throw;
+            }
         }
+        public void DeletePatient(int id)
+        {
+            _logger.LogInformation("Удаление объекта");
+            _logger.LogDebug("Объект: {id}", id);
+            try
+            {
+                using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+                var queryDelete = @"DELETE FROM Patients WHERE ID=@id";
+                connection.Execute(queryDelete, new { id });
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка при удалении объекта");
+                throw;
+            }
+        }
+        public Patient ReadPatientById(int id)
+        {
+            _logger.LogInformation("Получение объекта по идентификатору");
+            _logger.LogDebug("Объект: {id}", id);
+            try
+            {
+                using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+                var querySelect = @"SELECT * FROM Patients WHERE Id=@id";
+                var patient = connection.QueryFirst<Patient>(querySelect, new
+                {
+                    id
+                });
+                _logger.LogDebug("Найденный объект: {json}",
+                JsonConvert.SerializeObject(patient));
+                return patient;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка при поиске объекта");
+                throw;
+            }
+        }
+        public IEnumerable<Patient> ReadPatients()
+        {
+            _logger.LogInformation("Получение всех объектов");
+            try
+            {
+                using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+                var querySelect = "SELECT * FROM Patients";
+                var patients = connection.Query<Patient>(querySelect);
+                _logger.LogDebug("Полученные объекты: {json}",
+                JsonConvert.SerializeObject(patients));
+                return patients;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка при чтении объектов");
+                throw;
+            }
+        }
+        
     }
 }
diff --git a/ProjectPolyclinic/ProjectPolyclinic/appsettings.json b/ProjectPolyclinic/ProjectPolyclinic/appsettings.json
new file mode 100644
index 0000000..aaf8a2b
--- /dev/null
+++ b/ProjectPolyclinic/ProjectPolyclinic/appsettings.json
@@ -0,0 +1,15 @@
+{
+  "Serilog": {
+    "Using": [ "Serilog.Sinks.File" ],
+    "MinimumLevel": "Debug",
+    "WriteTo": [
+      {
+        "Name": "File",
+        "Args": {
+          "path": "Logs/polyclinic_log.txt",
+          "rollingInterval": "Day"
+        }
+      }
+    ]
+  }
+}
\ No newline at end of file