diff --git a/ProjectGasStation/ProjectGasStation/Implementations/ConnectionString.cs b/ProjectGasStation/ProjectGasStation/Implementations/ConnectionString.cs
index 6e46797..e233741 100644
--- a/ProjectGasStation/ProjectGasStation/Implementations/ConnectionString.cs
+++ b/ProjectGasStation/ProjectGasStation/Implementations/ConnectionString.cs
@@ -4,10 +4,11 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Npgsql;
 
 namespace ProjectGasStation.Implementations;
 
-public class ConnectionString : IConnectionString
+internal class ConnectionString : IConnectionString
 { 
-  string IConnectionString.ConnectionString => "";
+  string IConnectionString.ConnectionString => "Server=localhost;Port=5432;Database=GasStation;Username=postgres;Password=525252;";
 }
diff --git a/ProjectGasStation/ProjectGasStation/Implementations/EmployeeRepository.cs b/ProjectGasStation/ProjectGasStation/Implementations/EmployeeRepository.cs
index 138a4f0..90262af 100644
--- a/ProjectGasStation/ProjectGasStation/Implementations/EmployeeRepository.cs
+++ b/ProjectGasStation/ProjectGasStation/Implementations/EmployeeRepository.cs
@@ -1,4 +1,5 @@
-using ProjectGasStation.Entities;
+using Microsoft.Extensions.Logging;
+using ProjectGasStation.Entities;
 using ProjectGasStation.Entities.Enums;
 using ProjectGasStation.Repositories;
 using System;
@@ -6,6 +7,11 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Newtonsoft.Json;
+using System.Data.SqlClient;
+using Dapper;
+using Npgsql;
+
 
 namespace ProjectGasStation.Implementations;
 
@@ -13,32 +19,121 @@ public class EmployeeRepository : IEmployeeRepository
 {
     private readonly IConnectionString _connectionstring;
 
-    public EmployeeRepository(IConnectionString connectionString)
+    private readonly ILogger<EmployeeRepository> _logger;
+
+    public EmployeeRepository(IConnectionString connectionString, ILogger<EmployeeRepository> logger)
     {
         _connectionstring = connectionString;
+        _logger = logger;
     }
     public void CreateEmployee(Employee employee)
     {
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(employee));
 
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionstring.ConnectionString);
+            connection.Open();
+
+            var queryInsert = @"
+INSERT INTO Employees (Name, EmployeePost)
+VALUES (@Name, @EmployeePost)";
+
+            connection.Execute(queryInsert, employee);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
+    }
+
+    public void UpdateEmployee(Employee employee)
+    {
+        _logger.LogInformation("Редактирование объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(employee));
+
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionstring.ConnectionString);
+            connection.Open();
+
+            var queryUpdate = @"
+UPDATE Employees
+SET
+    Name=@Name,
+    EmployeePost=@EmployeePost
+WHERE Id=@Id";
+            connection.Execute(queryUpdate, employee);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта");
+            throw;
+        }
     }
 
     public void DeleteEmployee(int id)
     {
+        _logger.LogInformation("Удаление объекта");
+        _logger.LogDebug("Объект: {id}", id);
 
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionstring.ConnectionString);
+            connection.Open();
+
+            var queryDelete = @"
+DELETE FROM Employees
+WHERE Id=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта");
+            throw;
+        }
     }
 
     public Employee ReadEmployeeById(int id)
     {
-        return Employee.CreateEntity(0, string.Empty, EmployeePost.None);
+        _logger.LogInformation("Получение объекта по идентификатору");
+        _logger.LogDebug("Объект: {id}", id);
+
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionstring.ConnectionString);
+
+            var querySelect = @"
+SELECT * FROM Employees
+WHERE [Id]=@id";
+            var employee = connection.QueryFirst<Employee>(querySelect, new { id });
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(employee));
+            return employee;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта");
+            throw;
+        }
     }
 
-    public IEnumerable<Employee> ReadEmployees() 
+    public IEnumerable<Employee> ReadEmployees()
     {
-        return [];
-    }
-
-    public void UpdateEmployee(Employee employee) 
-    {
-
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionstring.ConnectionString);
+            var querySelect = "SELECT * FROM Employees";
+            var employees = connection.Query<Employee>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(employees));
+            return employees;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 }
diff --git a/ProjectGasStation/ProjectGasStation/Implementations/SupplierRepository.cs b/ProjectGasStation/ProjectGasStation/Implementations/SupplierRepository.cs
index 334659f..e0ad554 100644
--- a/ProjectGasStation/ProjectGasStation/Implementations/SupplierRepository.cs
+++ b/ProjectGasStation/ProjectGasStation/Implementations/SupplierRepository.cs
@@ -1,37 +1,125 @@
-using ProjectGasStation.Entities;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using ProjectGasStation.Entities;
 using ProjectGasStation.Repositories;
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
-
+using Dapper;
 namespace ProjectGasStation.Implementations;
 
 public class SupplierRepository : ISupplierRepository
 {
+    private readonly IConnectionString _connectionString;
+    private readonly ILogger<SupplierRepository> _logger;
+
+    public SupplierRepository(IConnectionString connectionString, ILogger<SupplierRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
     public void CreateSupplier(Supplier supplier)
     {
-
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(supplier));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryInsert = @"
+                INSERT INTO Suppliers (Name, inn)
+                VALUES (@Name, @inn)";
+            connection.Execute(queryInsert, supplier);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
     }
 
     public void DeleteSupplier(int id)
     {
-
+        _logger.LogInformation("Удаление объекта");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @"
+                DELETE FROM Suppliers
+                WHERE Id=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта");
+            throw;
+        }
     }
 
     public Supplier ReadSupplierById(int id)
     {
-        return Supplier.CreateEntity(0, string.Empty, string.Empty);
+        _logger.LogInformation("Получение объекта по идентификатору");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = @"
+                SELECT * FROM Suppliers
+                WHERE Id=@id";
+            var supplier = connection.QueryFirst<Supplier>(querySelect, new
+            {
+                id
+            });
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(supplier));
+            return supplier;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта");
+            throw;
+        }
     }
 
     public IEnumerable<Supplier> ReadSuppliers()
     {
-        return [];
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM Suppliers";
+            var suppliers = connection.Query<Supplier>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(suppliers));
+            return suppliers;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 
     public void UpdateSupplier(Supplier supplier) 
     {
-
+        _logger.LogInformation("Редактирование объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(supplier));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryUpdate = @"
+                UPDATE Suppliers
+                SET
+                Name=@Name,
+                inn=@inn           
+                WHERE Id=@Id";
+            connection.Execute(queryUpdate, supplier);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта");
+            throw;
+        }
     }
 }
diff --git a/ProjectGasStation/ProjectGasStation/Program.cs b/ProjectGasStation/ProjectGasStation/Program.cs
index db71b73..aab910d 100644
--- a/ProjectGasStation/ProjectGasStation/Program.cs
+++ b/ProjectGasStation/ProjectGasStation/Program.cs
@@ -1,6 +1,13 @@
 using ProjectGasStation.Implementations;
 using ProjectGasStation.Repositories;
 using Unity;
+using Unity.Lifetime;
+using Serilog;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Configuration;
+using Unity.Microsoft.Logging;
+using Newtonsoft.Json;
+
 
 namespace ProjectGasStation
 {
@@ -22,14 +29,29 @@ namespace ProjectGasStation
         {
             var container = new UnityContainer();
 
-            container.RegisterType<IEmployeeRepository, EmployeeRepository>();
-            container.RegisterType<IProductRepository, ProductRepository>();
-            container.RegisterType<IPurchaseRepository, PurchaseRepository>();
-            container.RegisterType<ISaleRepository, SaleRepository>();
-            container.RegisterType<ISupplierRepository, SupplierRepository>();
-            container.RegisterType<IConnectionString, ConnectionString>();
+            container.AddExtension(new LoggingExtension(CreateLoggerFactory()));
+
+
+            container.RegisterType<IEmployeeRepository, EmployeeRepository>(new TransientLifetimeManager());
+            container.RegisterType<IProductRepository, ProductRepository>(new TransientLifetimeManager());
+            container.RegisterType<IPurchaseRepository, PurchaseRepository>(new TransientLifetimeManager());
+            container.RegisterType<ISaleRepository, SaleRepository>(new TransientLifetimeManager());
+            container.RegisterType<ISupplierRepository, SupplierRepository>(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()
+            .SetBasePath(Directory.GetCurrentDirectory())
+            .AddJsonFile("appsettings.json")
+            .Build())
+            .CreateLogger());
+            return loggerFactory;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectGasStation/ProjectGasStation/ProjectGasStation.csproj b/ProjectGasStation/ProjectGasStation/ProjectGasStation.csproj
index 4e184fc..6aef442 100644
--- a/ProjectGasStation/ProjectGasStation/ProjectGasStation.csproj
+++ b/ProjectGasStation/ProjectGasStation/ProjectGasStation.csproj
@@ -2,19 +2,27 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0-windows7.0</TargetFramework>
+    <TargetFramework>net8.0-windows8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <UseWindowsForms>true</UseWindowsForms>
     <ImplicitUsings>enable</ImplicitUsings>
+    <SupportedOSPlatformVersion>8.0</SupportedOSPlatformVersion>
   </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="8.0.5" />
     <PackageReference Include="Serilog" Version="4.2.0" />
+    <PackageReference Include="Serilog.Extensions.Logging" Version="9.0.0" />
+    <PackageReference Include="Serilog.Settings.Configuration" Version="9.0.0" />
     <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
+    <PackageReference Include="System.Data.SqlClient" Version="4.9.0" />
     <PackageReference Include="Unity" Version="5.11.10" />
+    <PackageReference Include="Unity.Microsoft.Logging" Version="5.11.1" />
   </ItemGroup>
 
   <ItemGroup>