diff --git a/Car_Centre/CarCentreBusinessLogic/BusinessLogic/AutoLogic.cs b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/AutoLogic.cs
new file mode 100644
index 0000000..fb629af
--- /dev/null
+++ b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/AutoLogic.cs
@@ -0,0 +1,138 @@
+using CarCentreContracts.BindingModels;
+using CarCentreContracts.BusinessLogicsContracts;
+using CarCentreContracts.SearchModels;
+using CarCentreContracts.StorageContracts;
+using CarCentreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CarCentreBusinessLogic.BusinessLogic
+{
+    public class AutoLogic : IAutoLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IAutoStorage _WorkStorage;
+
+        public AutoLogic(ILogger<AutoLogic> logger, IAutoStorage WorkStorage)
+        {
+            _logger = logger;
+            _WorkStorage = WorkStorage;
+        }
+        public List<AutoViewModel>? ReadList(AutoSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. AutoName:{WorkName}. Id:{ Id}", model?.AutoName, model?.Id);
+            var list = model == null ? _WorkStorage.GetFullList() : _WorkStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public AutoViewModel? ReadElement(AutoSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. AutoName:{WorkName}.Id:{ Id}", model.AutoName, model.Id);
+            var element = _WorkStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public bool Create(WorkBindingModel model)
+        {
+            CheckModel(model);
+            if (_WorkStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(WorkBindingModel model)
+        {
+            CheckModel(model);
+            if (_WorkStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(WorkBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_WorkStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(WorkBindingModel model, bool withParams =
+        true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (model.AutoPrice <= 0)
+            {
+                throw new ArgumentNullException("Cтоимости посещения работаа должна быть больше 0",
+               nameof(model.AutoPrice));
+            }
+            _logger.LogInformation("Auto. AutoName:{AutoName}.AutoPrice:{AutoPrice} Id: { Id}", model.AutoName, model.AutoPrice, model.Id);
+            var element = _WorkStorage.GetElement(new AutoSearchModel
+            {
+                AutoName = model.AutoName
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("работа с таким названием уже есть");
+            }
+        }
+
+        List<AutoViewModel>? IAutoLogic.ReadList(AutoSearchModel? model)
+        {
+            throw new NotImplementedException();
+        }
+
+        AutoViewModel? IAutoLogic.ReadElement(AutoSearchModel model)
+        {
+            throw new NotImplementedException();
+        }
+
+        bool IAutoLogic.Create(WorkBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+
+        bool IAutoLogic.Update(WorkBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+
+        bool IAutoLogic.Delete(WorkBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
diff --git a/Car_Centre/CarCentreBusinessLogic/BusinessLogic/ClientLogic.cs b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/ClientLogic.cs
new file mode 100644
index 0000000..774d56f
--- /dev/null
+++ b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/ClientLogic.cs
@@ -0,0 +1,124 @@
+using CarCentreContracts.BindingModels;
+using CarCentreContracts.BusinessLogicsContracts;
+using CarCentreContracts.SearchModels;
+using CarCentreContracts.StorageContracts;
+using CarCentreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CarCentreBusinessLogic.BusinessLogic
+{
+    public class ClientLogic : IClientLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IClientStorage _clientStorage;
+
+        public ClientLogic(ILogger<ClientLogic> logger, IClientStorage clientStorage)
+        {
+            _logger = logger;
+            _clientStorage = clientStorage;
+        }
+
+        public List<ClientViewModel>? ReadList(ClientSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. ClientId:{Id}", model?.Id);
+            var list = model == null ? _clientStorage.GetFullList() : _clientStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public ClientViewModel? ReadElement(ClientSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. ClientFio:{ClientFio}.Id:{ Id}", model.ClientFIO, model.Id);
+            var element = _clientStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public bool Create(ClientBindingModel model)
+        {
+            CheckModel(model);
+            if (_clientStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(ClientBindingModel model)
+        {
+            CheckModel(model);
+            if (_clientStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(ClientBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_clientStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(ClientBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.ClientFIO))
+            {
+                throw new ArgumentNullException("Нет ФИО пользователя", nameof(model.ClientFIO));
+            }
+            if (string.IsNullOrEmpty(model.EMail))
+            {
+                throw new ArgumentNullException("Нет почты пользователя", nameof(model.EMail));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Нет пароля пользователя", nameof(model.Password));
+            }
+            _logger.LogInformation("Client. ClientFIO:{ClientFIO}.Email:{Email}.Password:{Password}.Id:{Id}",
+                model.ClientFIO, model.EMail, model.Password, model.Id);
+            var element = _clientStorage.GetElement(new ClientSearchModel
+            {
+                ClientFIO = model.ClientFIO
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Клиент с таким именем уже есть");
+            }
+        }
+    }
+}
diff --git a/Car_Centre/CarCentreBusinessLogic/BusinessLogic/EmployeeLogic.cs b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/EmployeeLogic.cs
new file mode 100644
index 0000000..65770ff
--- /dev/null
+++ b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/EmployeeLogic.cs
@@ -0,0 +1,117 @@
+using CarCentreContracts.BindingModels;
+using CarCentreContracts.BusinessLogicsContracts;
+using CarCentreContracts.SearchModels;
+using CarCentreContracts.StorageContracts;
+using CarCentreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CarCentreBusinessLogic.BusinessLogic
+{
+    public class EmployeeLogic : IEmployeeLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IEmployeeStorage _employeeStorage;
+
+        public EmployeeLogic(Microsoft.Extensions.Logging.ILogger<EmployeeLogic> logger, IEmployeeStorage employeeStorage)
+        {
+            _logger = logger;
+            _employeeStorage = employeeStorage;
+        }
+        public List<EmployeeViewModel>? ReadList(EmployeeSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. EmployeeFIO:{EmployeeFIO}. Id:{ Id}", model?.EmployeeFIO, model?.Id);
+            var list = model == null ? _employeeStorage.GetFullList() : _employeeStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public EmployeeViewModel? ReadElement(EmployeeSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. EmployeeFIO:{EmployeeFIO}.Id:{ Id}", model.EmployeeFIO, model.Id);
+            var element = _employeeStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public bool Create(EmployeeBindingModel model)
+        {
+            CheckModel(model);
+            if (_employeeStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(EmployeeBindingModel model)
+        {
+            CheckModel(model);
+            if (_employeeStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(EmployeeBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_employeeStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(EmployeeBindingModel model, bool withParams =
+        true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Login))
+            {
+                throw new ArgumentNullException("Нет логина сотрудника",
+               nameof(model.Login));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Нет пароля клиента", nameof(model.Password));
+            }
+            _logger.LogInformation("Employee. EmployeeFIO:{EmployeeFIO}.Login:{ Login}.Password:{Password} Id: { Id}", model.EmployeeFIO, model.Login, model.Password, model.Id);
+            var element = _employeeStorage.GetElement(new EmployeeSearchModel
+            {
+                EmployeeFIO = model.EmployeeFIO
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Сотрудник с таким логином уже есть");
+            }
+        }
+    }
+}
diff --git a/Car_Centre/CarCentreBusinessLogic/BusinessLogic/PaymentLogic.cs b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/PaymentLogic.cs
new file mode 100644
index 0000000..cb3d1b6
--- /dev/null
+++ b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/PaymentLogic.cs
@@ -0,0 +1,62 @@
+using CarCentreContracts.BindingModels;
+using CarCentreContracts.BusinessLogicsContracts;
+using CarCentreContracts.SearchModels;
+using CarCentreContracts.StorageContracts;
+using CarCentreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CarCentreBusinessLogic.BusinessLogic
+{
+    public class PaymentLogic : IPaymentLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IPaymentStorage _paymentStorage;
+        public PaymentLogic(ILogger<PaymentLogic> logger, IPaymentStorage paymentStorage)
+        {
+            _logger = logger;
+            _paymentStorage = paymentStorage;
+        }
+        public bool Create(PaymentBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool Delete(PaymentBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+
+        public PaymentViewModel? ReadElement(PaymentSearchModel model)
+        {
+            throw new NotImplementedException();
+        }
+
+        public List<PaymentViewModel>? ReadList(PaymentSearchModel? model)
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool Update(PaymentBindingModel model)
+        {
+            throw new NotImplementedException();
+        }
+        private void CheckModel(RequestBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            _logger.LogInformation("Request. Id: {Id}", model.Id);
+        }
+    }
+
+}
diff --git a/Car_Centre/CarCentreBusinessLogic/BusinessLogic/RequestLogic.cs b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/RequestLogic.cs
new file mode 100644
index 0000000..9caa8b4
--- /dev/null
+++ b/Car_Centre/CarCentreBusinessLogic/BusinessLogic/RequestLogic.cs
@@ -0,0 +1,95 @@
+using CarCentreContracts.BindingModels;
+using CarCentreContracts.BusinessLogicsContracts;
+using CarCentreContracts.SearchModels;
+using CarCentreContracts.StorageContracts;
+using CarCentreContracts.ViewModels;
+using CarCentreDataModels.Enums;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CarCentreBusinessLogic.BusinessLogic
+{
+    public class RequestLogic : IRequestLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IRequestStorage _RequestStorage;
+
+        public RequestLogic(ILogger<RequestLogic> logger, IRequestStorage RequestStorage)
+        {
+            _logger = logger;
+            _RequestStorage = RequestStorage;
+        }
+        public List<RequestViewModel>? ReadList(RequestSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. RequestName:{RequestName}. Id:{ Id}", model?.RequestName, model?.Id);
+            var list = model == null ? _RequestStorage.GetFullList() : _RequestStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public bool Create(RequestBindingModel model)
+        {
+            CheckModel(model);
+            if (_RequestStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool CheckRequestPay(RequestBindingModel model, RequestStatus status)
+        {
+            CheckModel(model);
+            var element = _RequestStorage.GetElement(new RequestSearchModel { Id = model.Id });
+            if (element == null)
+            {
+                _logger.LogWarning("Read operation failed");
+                return false;
+            }
+            if (element.Status != status - 1)
+            {
+                _logger.LogWarning("Status change operation failed");
+                throw new InvalidOperationException("Текущий статус заказа не может быть переведен в выбранный");
+            }
+            model.Status = status;
+            if (model.Status == RequestStatus.Неоплачен) model.DateFinish = DateTime.Now;
+            _RequestStorage.Update(model);
+            return true;
+        }
+        public bool RequestWasPaid(RequestBindingModel model)
+        {
+            return CheckRequestPay(model, RequestStatus.Оплачен);
+        }
+        private void CheckModel(RequestBindingModel model, bool withParams =
+        true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.RequestName))
+            {
+                throw new ArgumentNullException("Нет названия сделки",
+               nameof(model.RequestName));
+            }
+            if (model.RequestPrice <= 0)
+            {
+                throw new ArgumentNullException("Стоимость сделки должна быть >0", nameof(model.RequestPrice));
+            }
+            _logger.LogInformation("Request. RequestName:{RequestName}.RequestPrice:{ RequestPrice} Id: { Id}", model.RequestName, model.RequestPrice, model.Id);
+        }
+    }
+}
diff --git a/Car_Centre/CarCentreBusinessLogic/CarCentreBusinessLogic.csproj b/Car_Centre/CarCentreBusinessLogic/CarCentreBusinessLogic.csproj
new file mode 100644
index 0000000..a2e73d0
--- /dev/null
+++ b/Car_Centre/CarCentreBusinessLogic/CarCentreBusinessLogic.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\CarCentreContracts\CarCentreContracts.csproj" />
+    <ProjectReference Include="..\CarCentreDataModels\CarCentreDataModels.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/Car_Centre/CarCentreBusinessLogic/Class1.cs b/Car_Centre/CarCentreBusinessLogic/Class1.cs
new file mode 100644
index 0000000..7d6e4d6
--- /dev/null
+++ b/Car_Centre/CarCentreBusinessLogic/Class1.cs
@@ -0,0 +1,7 @@
+namespace CarCentreBusinessLogic
+{
+    public class Class1
+    {
+
+    }
+}
diff --git a/Car_Centre/Car_Centre.sln b/Car_Centre/Car_Centre.sln
index bffa55a..b7c8a3a 100644
--- a/Car_Centre/Car_Centre.sln
+++ b/Car_Centre/Car_Centre.sln
@@ -3,9 +3,11 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.9.34728.123
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CarCentreDataModels", "CarCentreDataModels\CarCentreDataModels.csproj", "{44ABE0E6-CF7F-4401-8264-CA9278EEE541}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CarCentreDataModels", "CarCentreDataModels\CarCentreDataModels.csproj", "{44ABE0E6-CF7F-4401-8264-CA9278EEE541}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CarCentreContracts", "CarCentreContracts\CarCentreContracts.csproj", "{C7B3BF74-07D4-4C4B-948D-EC87F53FC3B3}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CarCentreContracts", "CarCentreContracts\CarCentreContracts.csproj", "{C7B3BF74-07D4-4C4B-948D-EC87F53FC3B3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CarCentreBusinessLogic", "CarCentreBusinessLogic\CarCentreBusinessLogic.csproj", "{B4C7F6E2-1506-40F8-A819-5DEB65D0B2CF}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -21,6 +23,10 @@ Global
 		{C7B3BF74-07D4-4C4B-948D-EC87F53FC3B3}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C7B3BF74-07D4-4C4B-948D-EC87F53FC3B3}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C7B3BF74-07D4-4C4B-948D-EC87F53FC3B3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B4C7F6E2-1506-40F8-A819-5DEB65D0B2CF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B4C7F6E2-1506-40F8-A819-5DEB65D0B2CF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B4C7F6E2-1506-40F8-A819-5DEB65D0B2CF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B4C7F6E2-1506-40F8-A819-5DEB65D0B2CF}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE