diff --git a/University/UniversityBuisnessLogic/UserLogic.cs b/University/UniversityBuisnessLogic/UserLogic.cs
new file mode 100644
index 0000000..7c0557d
--- /dev/null
+++ b/University/UniversityBuisnessLogic/UserLogic.cs
@@ -0,0 +1,130 @@
+using UniversityContracts.BindingModels;
+using UniversityContracts.BuisnessLogicContracts;
+using UniversityContracts.SearchModels;
+using UniversityContracts.StoragesContracts;
+using UniversityContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace UniversityBuisnessLogic
+{
+    public class UserLogic : IUserLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IUserStorage _userStorage;
+
+        public UserLogic(ILogger<UserLogic> logger, IUserStorage userStorage)
+        {
+            _logger = logger;
+            _userStorage = userStorage;
+        }
+
+        public bool Create(UserBindingModel model)
+        {
+            CheckModel(model);
+            if (_userStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(UserBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_userStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public UserViewModel? ReadElement(UserSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Id:{Id}", model.Id);
+            var element = _userStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public List<UserViewModel>? ReadList(UserSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Id:{Id}", model?.Id);
+            var list = model == null ? _userStorage.GetFullList() : _userStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public bool Update(UserBindingModel model)
+        {
+            CheckModel(model);
+            if (_userStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(UserBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                throw new ArgumentNullException("Нет имени пользователя", nameof(model.Name));
+            }
+            if (string.IsNullOrEmpty(model.Surname))
+            {
+                throw new ArgumentNullException("Нет фамилии пользователя", nameof(model.Name));
+            }
+            if (string.IsNullOrEmpty(model.Login))
+            {
+                throw new ArgumentNullException("Нет логина", nameof(model.Name));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Нет фамилии пароля", nameof(model.Name));
+            }
+            else if (model.Password.Length < 6)
+            {
+                throw new ArgumentNullException("В пароле должно быть не менее 6 символов", nameof(model.Name));
+            }
+
+            _logger.LogInformation("User. Name:{Name}. Surname:{Surname}. Login: {Login} " +
+                                   "Password: {Password}. Id: {Id}", model.Name, model.Surname, model.Login, model.Password, model.Id);
+
+            var element = _userStorage.GetElement(new UserSearchModel
+            {
+                Login = model.Login,
+            });
+
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Пользователь с таким логином уже есть");
+            }
+        }
+    }
+}