diff --git a/Presence.Api/Controllers/GroupController.cs b/Presence.Api/Controllers/GroupController.cs
index 7d48a98..f692ba0 100644
--- a/Presence.Api/Controllers/GroupController.cs
+++ b/Presence.Api/Controllers/GroupController.cs
@@ -16,18 +16,19 @@ namespace Presence.Api.Controllers
             _groupService = groupService;
         }
 
-        [HttpGet]
-        public ActionResult<GroupResponse> GetAllGroups()
+        [HttpGet("/group")]
+        public async Task<ActionResult<GroupResponse>> GetAllGroups()
         {
             var result = _groupService
-                .GetGroupsWithStudents()
+                .GetGroupsWithStudents();
+            var response = result
                 .Select(group => new GroupResponse { 
                     Id = group.Id, 
                     Name = group.Name,
                     Users = group.Users.Select(user => new UserResponse {
                         Guid = user.Guid,
                         Name = user.Name
-                    }).Take(10).ToList(),
+                    }).ToList(),
                 }).ToList();
             return Ok(new GroupResponse());
         } 
diff --git a/Presence.Desktop/Models/GroupPresenter.cs b/Presence.Desktop/Models/GroupPresenter.cs
new file mode 100644
index 0000000..eb8c3be
--- /dev/null
+++ b/Presence.Desktop/Models/GroupPresenter.cs
@@ -0,0 +1,17 @@
+using Avalonia.Controls;
+using ReactiveUI;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Presence.Desktop.Models
+{
+    public class GroupPresenter
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public IEnumerable<UserPresenter>? users { get; set; } = null;
+    }
+}
\ No newline at end of file
diff --git a/Presence.Desktop/Models/UserPresenter.cs b/Presence.Desktop/Models/UserPresenter.cs
new file mode 100644
index 0000000..3a8b4a8
--- /dev/null
+++ b/Presence.Desktop/Models/UserPresenter.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Presence.Desktop.Models
+{
+    public class UserPresenter
+    {
+        public Guid Guid { get; set; }
+        public string Name { get; set; }
+        public GroupPresenter Group { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/Presence.Desktop/Presence.Desktop.csproj b/Presence.Desktop/Presence.Desktop.csproj
index 92a908c..33feb38 100644
--- a/Presence.Desktop/Presence.Desktop.csproj
+++ b/Presence.Desktop/Presence.Desktop.csproj
@@ -9,7 +9,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <Folder Include="Models\" />
     <AvaloniaResource Include="Assets\**" />
   </ItemGroup>
 
diff --git a/Presence.Desktop/ViewModels/MainWindowViewModel.cs b/Presence.Desktop/ViewModels/MainWindowViewModel.cs
index f92cbe7..a15d737 100644
--- a/Presence.Desktop/ViewModels/MainWindowViewModel.cs
+++ b/Presence.Desktop/ViewModels/MainWindowViewModel.cs
@@ -1,15 +1,73 @@
 using domain.UseCase;
+using DynamicData;
+using DynamicData.Binding;
+using Presence.Desktop.Models;
+using ReactiveUI;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Reactive.Linq;
+using Tmds.DBus.Protocol;
 
 namespace Presence.Desktop.ViewModels
 {
     public class MainWindowViewModel : ViewModelBase
     {
         private readonly IGroupUseCase _groupService;
-        public MainWindowViewModel(IGroupUseCase groupService)
+        private List<GroupPresenter> groupPresentersDataSource = new List<GroupPresenter>();
+        private ObservableCollection<GroupPresenter> _groups;
+        public ObservableCollection<GroupPresenter> Groups => _groups;
+
+        public GroupPresenter? SelectedGroupItem
         {
-            _groupService = groupService;
+            get => _selectedGroupItem;
+            set => this.RaiseAndSetIfChanged(ref _selectedGroupItem, value);
         }
 
-        public string Greeting { get; } = "Welcome to Avalonia!";
+        private GroupPresenter? _selectedGroupItem;
+
+        public ObservableCollection<UserPresenter> Users { get => _users; }
+        public ObservableCollection<UserPresenter> _users;
+        public MainWindowViewModel(IGroupUseCase groupUseCase)
+        {
+            _groupService = groupUseCase;
+
+            foreach (var item in _groupService.GetGroupsWithStudents())
+            {
+                GroupPresenter groupPresenter = new GroupPresenter
+                {
+                    Id = item.Id,
+                    Name = item.Name,
+                    users = item.Users?.Select(user => new UserPresenter
+                    {
+                        Name = user.Name,
+                        Guid = user.Guid,
+                        Group = new GroupPresenter { Id = item.Id, Name = item.Name }
+                    }
+                    ).ToList()
+                };
+                groupPresentersDataSource.Add(groupPresenter);
+            }
+            _groups = new ObservableCollection<GroupPresenter>(groupPresentersDataSource);
+
+            _users = new ObservableCollection<UserPresenter>();
+
+            this.WhenAnyValue(vm => vm.SelectedGroupItem)
+                .Subscribe(_ => SetUsers());
+
+        }
+
+        private void SetUsers()
+        {
+            if (SelectedGroupItem == null) return;
+            if (SelectedGroupItem.users == null) return;
+            Users.Clear();
+            foreach (var item in SelectedGroupItem.users)
+            {
+                Users.Add(item);
+            }
+        }
     }
 }
+
diff --git a/Presence.Desktop/Views/MainWindow.axaml b/Presence.Desktop/Views/MainWindow.axaml
index a158e7f..d7f4c81 100644
--- a/Presence.Desktop/Views/MainWindow.axaml
+++ b/Presence.Desktop/Views/MainWindow.axaml
@@ -9,12 +9,40 @@
         Icon="/Assets/avalonia-logo.ico"
         Title="Presence.Desktop">
 
-    <Design.DataContext>
-        <!-- This only sets the DataContext for the previewer in an IDE,
-             to set the actual DataContext for runtime, set the DataContext property in code (look at App.axaml.cs) -->
-        <vm:MainWindowViewModel/>
-    </Design.DataContext>
-
-    <TextBlock Text="{Binding Greeting}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+	<Design.DataContext>
+		<vm:MainWindowViewModel/>
+	</Design.DataContext>
+	<DockPanel Background="Azure">
+		<StackPanel DockPanel.Dock="Bottom">
+			<TextBlock Text="List ↑" HorizontalAlignment="Center"/>
+		</StackPanel>
+		<StackPanel
+			Spacing="10"
+			HorizontalAlignment="Center"
+			DockPanel.Dock="Top"
+			Orientation="Horizontal">
+			<TextBlock Text="Combobox ->"/>
+			<ComboBox  ItemsSource="{Binding Groups}" SelectedValue="{Binding SelectedGroupItem}">
+				<ComboBox.ItemTemplate>
+					<DataTemplate>
+						<TextBlock Text="{Binding Name}"/>
+					</DataTemplate>
+				</ComboBox.ItemTemplate>
+			</ComboBox>
+			<ComboBox/>
+			<ComboBox/>
+		</StackPanel>
+		<Border>
+			<ListBox Background="Bisque" ItemsSource="{Binding Users}">
+				<ListBox.ItemTemplate>
+					<DataTemplate>
+						<StackPanel Orientation="Horizontal">
+							<TextBlock Text="{Binding Name}" />
+						</StackPanel>
+					</DataTemplate>
+				</ListBox.ItemTemplate>
+			</ListBox>
+		</Border>
+	</DockPanel>
 
 </Window>
diff --git a/data/Repository/IGroupRepository.cs b/data/Repository/IGroupRepository.cs
index 5be29fb..5bee0c6 100644
--- a/data/Repository/IGroupRepository.cs
+++ b/data/Repository/IGroupRepository.cs
@@ -10,6 +10,7 @@ namespace data.Repository
     public interface IGroupRepository
     {
         public IEnumerable<GroupDAO> getAllGroup();
+        public Task<IEnumerable<GroupDAO>> getAllGroupAsync();
         public bool addGroup(GroupDAO group);
         public bool addGroupWithStudents(GroupDAO group, IEnumerable<UserDAO> userDAOs);
     }
diff --git a/data/Repository/SQLGroupRepository.cs b/data/Repository/SQLGroupRepository.cs
index 2c34b3b..25bcdbb 100644
--- a/data/Repository/SQLGroupRepository.cs
+++ b/data/Repository/SQLGroupRepository.cs
@@ -59,5 +59,10 @@ namespace data.Repository
             }
             return false;
         }
+
+        public async Task<IEnumerable<GroupDAO>> getAllGroupAsync()
+        {
+            return await dbContext.groups.Include(group => group.Users).ToListAsync();
+        }
     }
 }
diff --git a/domain/Entity/GroupEntity.cs b/domain/Entity/GroupEntity.cs
index 2bdbe91..7bf6fe6 100644
--- a/domain/Entity/GroupEntity.cs
+++ b/domain/Entity/GroupEntity.cs
@@ -10,7 +10,7 @@ namespace domain.Entity
     {
         public int Id { get; set; }
         public string Name { get; set; }
-        public IEnumerable<UserEntity> Users { get; set; } = null;
+        public List<UserEntity> Users { get; set; } = null;
 
     }
 }
diff --git a/domain/Service/GroupService.cs b/domain/Service/GroupService.cs
index 21368cf..d3877d8 100644
--- a/domain/Service/GroupService.cs
+++ b/domain/Service/GroupService.cs
@@ -52,5 +52,28 @@ namespace domain.Service
                         }).ToList()
                 }).ToList();
         }
+
+        public async Task<IEnumerable<GroupEntity>> GetGroupsWithStudentsAsync()
+        {
+            var result = await _groupRepository.getAllGroupAsync();
+
+            return result.Select(
+                group => new GroupEntity
+                {
+                    Id = group.Id,
+                    Name = group.Name,
+                    Users = group.Users.Select(
+                        user => new UserEntity
+                        {
+                            Guid = user.Guid,
+                            Name = user.Name,
+                            Group = new GroupEntity
+                            {
+                                Id = group.Id,
+                                Name = group.Name,
+                            }
+                        }).ToList()
+                }).ToList();
+        }
     }
 }
diff --git a/domain/UseCase/IGroupUseCase.cs b/domain/UseCase/IGroupUseCase.cs
index 7e027d8..a0d65dd 100644
--- a/domain/UseCase/IGroupUseCase.cs
+++ b/domain/UseCase/IGroupUseCase.cs
@@ -11,6 +11,7 @@ namespace domain.UseCase
     public interface IGroupUseCase
     {
         public IEnumerable<GroupEntity> GetGroupsWithStudents();
+        public Task<IEnumerable<GroupEntity>> GetGroupsWithStudentsAsync();
         public void AddGroup(AddGroupRequest addGroupRequest);
         public void AddGroupWithStudents(AddGroupWithStudentsRequest addGroupWithStudents);
     }
diff --git a/semesterWork.sln b/semesterWork.sln
index 0ad426e..1f99b92 100644
--- a/semesterWork.sln
+++ b/semesterWork.sln
@@ -7,7 +7,14 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "console_ui", "console_ui\co
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "data", "data\data.csproj", "{28FE5F1E-5D2B-4750-AE24-A15BB8A5972D}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "domain", "domain\domain.csproj", "{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "domain", "domain\domain.csproj", "{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Presence.Api", "Presence.Api\Presence.Api.csproj", "{0493354A-C0C0-49FC-A143-28F2268309E2}"
+	ProjectSection(ProjectDependencies) = postProject
+		{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63} = {78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Presence.Desktop", "Presence.Desktop\Presence.Desktop.csproj", "{D646BC7E-8025-4985-AF9B-5E4474AD7F66}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -27,6 +34,14 @@ Global
 		{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{78C8AC9B-2B4D-4C71-8469-C6DAE16C9A63}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0493354A-C0C0-49FC-A143-28F2268309E2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0493354A-C0C0-49FC-A143-28F2268309E2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0493354A-C0C0-49FC-A143-28F2268309E2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0493354A-C0C0-49FC-A143-28F2268309E2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D646BC7E-8025-4985-AF9B-5E4474AD7F66}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D646BC7E-8025-4985-AF9B-5E4474AD7F66}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D646BC7E-8025-4985-AF9B-5E4474AD7F66}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D646BC7E-8025-4985-AF9B-5E4474AD7F66}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE