diff --git a/Zurnal/Date/Repository/GroupRepositoryImpl.cs b/Zurnal/Date/Repository/GroupRepositoryImpl.cs
index 96dac90..5941b31 100644
--- a/Zurnal/Date/Repository/GroupRepositoryImpl.cs
+++ b/Zurnal/Date/Repository/GroupRepositoryImpl.cs
@@ -14,9 +14,9 @@ namespace Zurnal.Data.Repository
         public List<GroupDao> AllGroup => GroupDao.Name.ToList();
 
         public IEnumerable<GroupDao> GetAllGroups()
-        {
-            return GroupDao.Name;
-        }
+{
+    return GroupDao.Name;
+}
 
         public void AddGroup(GroupDao group)
         {
@@ -28,30 +28,36 @@ namespace Zurnal.Data.Repository
         }
 
         public void UpdateGroupName(int groupId, string name)
-        {
-            var group = GroupDao.Name.FirstOrDefault(g => g.Id == groupId);
-            if (group != null)
-            {
-                group.Name = name;
-            }
-        }
+{
+    var group = GroupDao.Name.FirstOrDefault(g => g.Id == groupId);
+    if (group != null)
+    {
+        group.GroupName = name; 
+    }
+}
 
-        public GroupDao GetGroupById(int id)
-        {
-            return GroupDao.groups.FirstOrDefault(g => g.Id == id);
-        }
+public bool UpdateGroupById(int groupId, GroupDao updatedGroup)
+{
+    var group = GroupDao.Name.FirstOrDefault(g => g.Id == groupId);
+    if (group != null)
+    {
+        group.GroupName = updatedGroup.GroupName; 
+        return true;
+    }
+    return false;
+}
 
         private static string GetDebuggerDisplay()
         {
-            return $"GroupRepository with {GroupDao.groups.Count} groups";
+            return $"GroupRepository with {GroupDao.Name.Count} groups";
         }
 
         public bool RemoveGroupById(int groupId)
         {
-            var group = GroupDao.groups.FirstOrDefault(g => g.Id == groupId);
+            var group = GroupDao.Name.FirstOrDefault(g => g.Id == groupId);
             if (group != null)
             {
-                GroupDao.groups.Remove(group);
+                GroupDao.Name.Remove(group);
                 return true;
             }
             return false;
@@ -59,61 +65,41 @@ namespace Zurnal.Data.Repository
 
         public IEnumerable<GroupDao> AllGroups()
         {
-            return GroupDao.groups.Select(g => new GroupDao { GroupName = g.Name, Id = g.Id });
-        }
-
-        public bool UpdateGroupById(int groupId, GroupDao updatedGroup)
-        {
-            var group = GroupDao.groups.FirstOrDefault(g => g.Id == groupId);
-            if (group != null)
-            {
-                group.Name = updatedGroup.GroupName;
-                return true;
-            }
-            return false;
-        }
-
-        public void UpdateGroup(GroupDao group)
-        {
-            var existingGroup = GroupDao.groups.FirstOrDefault(g => g.Id == group.Id);
-            if (existingGroup != null)
-            {
-                existingGroup.Name = group.GroupName;
-            }
+            return GroupDao.Name.Select(g => new GroupDao { GroupName = g.GroupName, Id = g.Id });
         }
 
         public void DeleteGroup(int id)
         {
-            var group = GroupDao.groups.FirstOrDefault(g => g.Id == id);
+            var group = GroupDao.Name.FirstOrDefault(g => g.Id == id);
             if (group != null)
             {
-                GroupDao.groups.Remove(group);
+                GroupDao.Name.Remove(group);
             }
         }
 
-        public bool AddGroup(GroupDao newGroup)
-        {
-            if (newGroup == null)
-            {
-                throw new ArgumentNullException(nameof(newGroup));
-            }
-            GroupDao.groups.Add(newGroup);
-            return true;
-        }
-
-        public void AddGroupFromRegex(Group group)
-        {
-            throw new NotImplementedException();
-        }
-
         IEnumerable<Group> IGroupRepository.AllGroups()
         {
             throw new NotImplementedException();
         }
 
+        bool IGroupRepository.AddGroup(GroupDao newGroup)
+        {
+            throw new NotImplementedException();
+        }
+
         public void AddGroupFromRegex(Group group)
         {
             throw new NotImplementedException();
         }
+
+        public GroupDao GetGroupById(int id)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void UpdateGroup(GroupDao group)
+        {
+            throw new NotImplementedException();
+        }
     }
 }
\ No newline at end of file
diff --git a/Zurnal/RemaDateBase/DateDao/GroupDao.cs b/Zurnal/RemaDateBase/DateDao/GroupDao.cs
index a365118..336c9fd 100644
--- a/Zurnal/RemaDateBase/DateDao/GroupDao.cs
+++ b/Zurnal/RemaDateBase/DateDao/GroupDao.cs
@@ -1,11 +1,11 @@
 namespace Zurnal.RemaDateBase.DateDao
 {
     public class GroupDao
-{
-        internal static IEnumerable<GroupDao> Name;
+    {
+        internal static List<GroupDao> Name = new List<GroupDao>();
 
         public int Id { get; set; }
-	public required string GroupName { get; set; }
-	public IEnumerable<UserDao> Users { get; set; }
-}
+        public required string GroupName { get; set; }
+        public IEnumerable<UserDao> Users { get; set; }
+    }
 }
\ No newline at end of file
diff --git a/Zurnal/obj/Debug/net8.0/Zurnal.AssemblyInfo.cs b/Zurnal/obj/Debug/net8.0/Zurnal.AssemblyInfo.cs
index c589e4d..3c016f8 100644
--- a/Zurnal/obj/Debug/net8.0/Zurnal.AssemblyInfo.cs
+++ b/Zurnal/obj/Debug/net8.0/Zurnal.AssemblyInfo.cs
@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("Zurnal")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+d72fa803793c5d114c3eabb8fe2de04cd2042db1")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+d8b97b4d4726ad4a4fb1b1f71d1f4e9c62ebd29b")]
 [assembly: System.Reflection.AssemblyProductAttribute("Zurnal")]
 [assembly: System.Reflection.AssemblyTitleAttribute("Zurnal")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/Zurnal/obj/Debug/net8.0/Zurnal.AssemblyInfoInputs.cache b/Zurnal/obj/Debug/net8.0/Zurnal.AssemblyInfoInputs.cache
index 1282f10..0154547 100644
--- a/Zurnal/obj/Debug/net8.0/Zurnal.AssemblyInfoInputs.cache
+++ b/Zurnal/obj/Debug/net8.0/Zurnal.AssemblyInfoInputs.cache
@@ -1 +1 @@
-7af827faec1f5dd576cc86e70a9c41ec992b431c5545340778b3dec093fd4ac1
+c3dcf515a535c8feb2557d6f2ba5b36f9feac86b0ec88244007d55a701c20bcf