Demo/Data/Repository/GroupRepositoryImpl.cs

@@ -8,33 +8,8 @@ using System.Threading.Tasks;
 
 namespace Demo.Data.Repository
 {
-    public class GroupRepositoryImpl:IGroupRepository
+    public class GroupRepositoryImpl
     {
-        public bool AddGroup(GroupLocalEntity newGroup)
-        {
-            throw new NotImplementedException();
-        }
-
-        public List<GroupLocalEntity> GetAllGroup()
-        {
-            throw new NotImplementedException();
-        }
-
-        public List<GroupLocalEntity> GetAllGroups() => LocalStaticData.groups;
-
-        public GroupLocalEntity GetGroupById(int groupID)
-        {
-            throw new NotImplementedException();
-        }
-
-        public bool RemoveGroupById(int groupID)
-        {
-            throw new NotImplementedException();
-        }
-
-        public bool UpdateGroupById(int groupID, GroupLocalEntity updatedGroup)
-        {
-            throw new NotImplementedException();
-        }
+       public List<GroupLocalEntity> GetAllGroups() => LocalStaticData.groups;
     }
 }

Demo/Data/Repository/IGroupRepository.cs

@@ -1,18 +0,0 @@
-using Demo.domain.Models;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Demo.Data.Repository
-{
-    public interface IGroupRepository
-    {
-        List<GroupLocalEntity> GetAllGroup();
-        bool RemoveGroupById(int groupID);
-        bool UpdateGroupById(int groupID, GroupLocalEntity updatedGroup);
-        GroupLocalEntity GetGroupById(int groupID);
-        bool AddGroup(GroupLocalEntity newGroup);
-    }
-}

Demo/Demo.csproj

@@ -11,8 +11,4 @@
     <Folder Include="Data\RemoteData\" />
   </ItemGroup>
 
-  <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
-  </ItemGroup>
-
 </Project>

Demo/Domain/UseCase/UserUseCase.cs

@@ -10,19 +10,19 @@ namespace Demo.Domain.UseCase
 {
     public class UserUseCase
     {
-        private readonly UserRepositoryImpl _repositoryUserImpl;
-        private readonly IGroupRepository _repositoryGroupImpl;
+        private UserRepositoryImpl _repositoryUserImpl;
+        private GroupRepositoryImpl _repositoryGroupImpl;
 
-        public UserUseCase(UserRepositoryImpl repositoryImpl, IGroupRepository repositoryGroupImpl)
+        public UserUseCase(UserRepositoryImpl repositoryImpl, GroupRepositoryImpl repositoryGroupImpl)
         {
             _repositoryUserImpl = repositoryImpl;
             _repositoryGroupImpl = repositoryGroupImpl;
         }
 
-      private List<Group> GetAllGroups() => _repositoryGroupImpl.GetAllGroup()
+      public List<Group> GetAllGroups() => _repositoryGroupImpl.GetAllGroups()
             .Select(it => new Group { Id  = it.Id, Name = it.Name}).ToList();
       public List<User> GetAllUsers() => _repositoryUserImpl.GetAllUsers
-            .Join(_repositoryGroupImpl.GetAllGroup(),
+            .Join(_repositoryGroupImpl.GetAllGroups(),
             user => user.GroupID,
             group => group.Id,
             (user, group) => 

Demo/Program.cs

@@ -3,8 +3,6 @@ using Demo.Data.Repository;
 using Demo.Domain.UseCase;
 using Demo.UI;
 
-
-
 GroupRepositoryImpl groupRepositoryImpl = new GroupRepositoryImpl();
 UserRepositoryImpl userRepositoryImpl = new UserRepositoryImpl();
 UserUseCase userUseCase = new UserUseCase(userRepositoryImpl, groupRepositoryImpl);