diff --git a/Zurnal/Date/Repository/UserRepositoryImpl.cs b/Zurnal/Date/Repository/UserRepositoryImpl.cs
index 86b2cef..22f288c 100644
--- a/Zurnal/Date/Repository/UserRepositoryImpl.cs
+++ b/Zurnal/Date/Repository/UserRepositoryImpl.cs
@@ -2,6 +2,7 @@
 using Zurnal.Date.LocalDate;
 using Zurnal.Date.Repository;
 using Zurnal.Domain.UseCase;
+using Zurnal.RemaDateBase.DateDao;
 
 namespace Zurnal.Data.Repository
 {
@@ -68,9 +69,17 @@ namespace Zurnal.Data.Repository
             throw new NotImplementedException();
         }
 
-        public List<GroupLocalEntity> AllGroup => throw new NotImplementedException();
+        public IEnumerable<System.Text.RegularExpressions.Group> AllGroups()
+        {
+            throw new NotImplementedException();
+        }
 
-        internal UserUseCase.UserLocalEntity? UpdateUser(UserUseCase.UserLocalEntity userLocalEntity)
+        public bool UpdateGroupById(int groupID, GroupDao updatedGroup)
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool AddGroup(GroupDao newGroup)
         {
             throw new NotImplementedException();
         }
@@ -80,17 +89,17 @@ namespace Zurnal.Data.Repository
             throw new NotImplementedException();
         }
 
-        System.Text.RegularExpressions.Group IGroupRepository.GetGroupById(int id)
+        GroupDao IGroupRepository.GetGroupById(int id)
         {
             throw new NotImplementedException();
         }
 
-        IEnumerable<System.Text.RegularExpressions.Group> IGroupRepository.GetAllGroups()
+        IEnumerable<GroupDao> IGroupRepository.GetAllGroups()
         {
             throw new NotImplementedException();
         }
 
-        public void UpdateGroup(System.Text.RegularExpressions.Group group)
+        public void UpdateGroup(GroupDao group)
         {
             throw new NotImplementedException();
         }
@@ -99,5 +108,9 @@ namespace Zurnal.Data.Repository
         {
             throw new NotImplementedException();
         }
+
+        public List<GroupLocalEntity> AllGroup => throw new NotImplementedException();
+
+        List<GroupDao> IGroupRepository.AllGroup => throw new NotImplementedException();
     }
 }
\ No newline at end of file
diff --git a/Zurnal/Domain/UseCase/GroupUseCase.cs b/Zurnal/Domain/UseCase/GroupUseCase.cs
index 6f90712..76ed704 100644
--- a/Zurnal/Domain/UseCase/GroupUseCase.cs
+++ b/Zurnal/Domain/UseCase/GroupUseCase.cs
@@ -1,14 +1,19 @@
+using System.Text.RegularExpressions;
 using Zurnal.Data.Repository;
-using Zurnal.domain.Models;
+using Zurnal.Date.Repository;
+using Zurnal.RemaDateBase.DateDao;
 namespace Zurnal.Domain.UseCase
 {
-    public class GroupUseCase
+    public class GroupUseCase : IGroupRepository
     {
         private UserRepositoryImpl _repositoryUserImpl;
         private GroupRepositoryImpl _repositoryGroupImpl;
 
-        public List<Group> GetAllGroups() => _repositoryGroupImpl.GetAllGroups()
-            .Select(it => new Group { Id = it.Id, Name = it.Name }).ToList();
+        public List<GroupDao> AllGroup => throw new NotImplementedException();
+
+
+        public List<GroupDao> GetAllGroups() => _repositoryGroupImpl.GetAllGroups()
+    .Select(it => new GroupDao { Id = it.Id, GroupName = it.GroupName }).ToList();
 
         public GroupUseCase(UserRepositoryImpl repositoryImpl, GroupRepositoryImpl repositoryGroupImpl)
         {
@@ -16,7 +21,7 @@ namespace Zurnal.Domain.UseCase
             _repositoryGroupImpl = repositoryGroupImpl;
         }
 
-        public void AddGroup(Group group)
+        public void AddGroup(GroupDao group)
         {
             _repositoryGroupImpl.AddGroup(group: group);
         }
@@ -26,5 +31,62 @@ namespace Zurnal.Domain.UseCase
     _repositoryGroupImpl.UpdateGroupName(groupId, newName);
 }
 
+        public IEnumerable<GroupDao> AllGroups()
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool RemoveGroupById(int groupID)
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool UpdateGroupById(int groupID, GroupDao updatedGroup)
+        {
+            throw new NotImplementedException();
+        }
+
+        IEnumerable<GroupDao> IGroupRepository.GetAllGroups() 
+{
+    return _repositoryGroupImpl.GetAllGroups()
+        .Select(it => new GroupDao { Id = it.Id, GroupName = it.GroupName, Users = it.Users })
+        .ToList();
+}
+
+        public void AddGroupFromRegex(System.Text.RegularExpressions.Group group)
+        {
+            throw new NotImplementedException();
+        }
+
+        public GroupDao GetGroupById(int id)
+{
+    var group = _repositoryGroupImpl.GetGroupById(id);
+    if (group == null)
+    {
+        throw new KeyNotFoundException($"Группа с ID {id} не найдена.");
+    }
+    return group;
+}
+
+
+        public void UpdateGroup(GroupDao group)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void DeleteGroup(int id)
+        {
+            throw new NotImplementedException();
+        }
+
+        IEnumerable<Group> IGroupRepository.AllGroups()
+        {
+            throw new NotImplementedException();
+        }
+
+        bool IGroupRepository.AddGroup(GroupDao newGroup)
+        {
+            throw new NotImplementedException();
+        }
     }
 }
\ No newline at end of file
diff --git a/Zurnal/Domain/UseCase/UserUseCase.cs b/Zurnal/Domain/UseCase/UserUseCase.cs
index 6369f49..961e748 100644
--- a/Zurnal/Domain/UseCase/UserUseCase.cs
+++ b/Zurnal/Domain/UseCase/UserUseCase.cs
@@ -1,6 +1,5 @@
 using Zurnal.Data.Repository;
 using Zurnal.Date.Repository;
-using Zurnal.domain.Models;
 using Zurnal.RemaDateBase.DateDao;
 
 namespace Zurnal.Domain.UseCase
@@ -16,45 +15,57 @@ namespace Zurnal.Domain.UseCase
             RepositoryGroupImpl = (IGroupRepository?)(repositoryGroupImpl ?? throw new ArgumentNullException(nameof(repositoryGroupImpl)));
         }
 
-        public List<User> GetAllUsers() => _repositoryUserImpl.GetAllUsersList()
+        public List<UserDao> GetAllUsers() => _repositoryUserImpl.GetAllUsersList()
             .Join(RepositoryGroupImpl.AllGroup,
             user => user.GroupID,
             group => group.Id,
             (user, group) => 
-            new User { FIO = user.FIO, 
-                Guid = user.Guid, 
-                Group = new Group { Id = group.Id, Name = group.GroupName } }
-            ).ToList();
+    new UserDao { FIO = user.FIO, 
+        UserGuid = user.Guid, 
+        Group = new GroupDao { Id = group.Id, GroupName = group.GroupName }, 
+        GroupID = group.Id }
+    ).ToList();
 
         public bool RemoveUserByGuid(Guid userGuid) 
         {
             return _repositoryUserImpl.RemoveUserByGuid(userGuid);
         }
 
-        public User UpdateUser(User user, int groupId)
+        public UserDao UpdateUser(UserDao user, int groupId)
 {
-    UserLocalEntity userLocalEntity = new UserLocalEntity { FIO = user.FIO, GroupID = groupId, Guid = user.Guid };
+    UserLocalEntity userLocalEntity = new UserLocalEntity { FIO = user.FIO, GroupID = groupId, Guid = user.UserGuid };
     UserLocalEntity? result = _repositoryUserImpl.UpdateUser(userLocalEntity);
-    if (result == null) throw new Exception("User update failed.");
-    Group? group = GetAllGroups().FirstOrDefault(it => it.Id == result.GroupID);
-    if (group == null) throw new Exception("Group not found.");
-    return new User { FIO = user.FIO, Guid = user.Guid, Group = group };
+    if (result == null) throw new Exception("Пользователь не обновлен.");
+    GroupDao? group = GetAllGroups().FirstOrDefault(it => it.Id == result.GroupID);
+    if (group == null) throw new Exception("Група не нфйдуна.");
+    return new UserDao { FIO = user.FIO, UserGuid = user.UserGuid, Group = group, GroupID = group.Id };
 }
 
-        private List<Group> GetAllGroups()
+        public IEnumerable<GroupDao> GetAllGroups()
 {
-    return RepositoryGroupImpl.AllGroup.Select(g => new Group { Id = g.Id, Name = g.GroupName }).ToList();
+    return RepositoryGroupImpl.AllGroup;
 }
 
-        public User FindUserByGuid(Guid userGuid)
-        {
-            var user = _repositoryUserImpl.GetAllUsersList().FirstOrDefault(u => u.Guid == userGuid);
-            if (user == null) throw new Exception("Пользователь не найден.");
-            var group = RepositoryGroupImpl.AllGroup.FirstOrDefault(g => g.Id == user.GroupID);
-            return new User { FIO = user.FIO, Guid = user.Guid, Group = group };
-        }
+        public UserDao FindUserByGuid(Guid userGuid)
+{
+    var user = _repositoryUserImpl.GetAllUsersList().FirstOrDefault(u => u.Guid == userGuid);
+    if (user == null) 
+    {
+        Console.WriteLine("Пользователь не найден.");
+        return null; 
+    }
+    
+    GroupDao group = RepositoryGroupImpl.AllGroup.FirstOrDefault(g => g.Id == user.GroupID);
+    if (group == null) 
+    {
+        Console.WriteLine("Группа не найдена.");
+        return null; 
+    }
+    
+    return new UserDao { FIO = user.FIO, UserGuid = user.Guid, Group = group, GroupID = group.Id };
+}
 
-        public List<Group> AllGroup => new List<Group>();
+        public List<GroupDao> AllGroup => RepositoryGroupImpl.AllGroup.ToList();
         List<GroupDao> IGroupRepository.AllGroup => throw new NotImplementedException();
 
         IEnumerable<System.Text.RegularExpressions.Group> IGroupRepository.AllGroups()
diff --git a/Zurnal/RemaDateBase/DateDao/GroupDao.cs b/Zurnal/RemaDateBase/DateDao/GroupDao.cs
index 336c9fd..ba8baa2 100644
--- a/Zurnal/RemaDateBase/DateDao/GroupDao.cs
+++ b/Zurnal/RemaDateBase/DateDao/GroupDao.cs
@@ -1,4 +1,5 @@
-namespace Zurnal.RemaDateBase.DateDao
+
+namespace Zurnal.RemaDateBase.DateDao
 {
     public class GroupDao
     {