Design

TV Player WPF/ViewModels/MainViewModel.cs

@@ -19,17 +19,18 @@ namespace TV_Player
             set => SetProperty(ref _isTopPanelVisible, value);
         }
 
+        private string _topPaneTitle;
+        public string TopPanelTitle
+        {
+            get => _topPaneTitle;
+            set => SetProperty(ref _topPaneTitle, value);
+        }
+
         public Action ButtonBackAction { get; set; }
         public ICommand BackCommand { get; }
 
         public MainViewModel()
-        {
-            var vm = new ProgramsGroupViewModel();
-
-            var control = new ProgramsGroupGrid();
-            control.DataContext = vm;
-            Control = control;
-
+        {          
             BackCommand = new RelayCommand(OnButtonBackClick);
         }
         private void OnButtonBackClick()

TV Player WPF/ViewModels/PlayerViewModel.cs

@@ -16,6 +16,13 @@ namespace TV_Player
             set => SetProperty(ref _currentProgram, value);
         }
 
+        private string _topPaneTitle;
+        public string TopPanelTitle
+        {
+            get => _topPaneTitle;
+            set => SetProperty(ref _topPaneTitle, value);
+        }
+
         public M3UInfo SelectedItem { get; set; }
         public ICommand BackCommand { get; }
 
@@ -23,7 +30,8 @@ namespace TV_Player
         {
             _currentProgram = selectedProgram;
             BackCommand = new RelayCommand(OnButtonBackClick);
-            TVPlayerViewModel.Instance.TopPanelVisible(false);
+            TVPlayerViewModel.Instance.TopPanelVisible(false, selectedProgram.Name);
+            TopPanelTitle = selectedProgram.Name;
         }
 
         private void OnButtonBackClick()

TV Player WPF/ViewModels/ProgramsGroupViewModel.cs

@@ -21,7 +21,7 @@ namespace TV_Player
             ItemSelectedCommand = new RelayCommand(OnItemSelected);
             ProgramsData.Instance.GroupsInformation.Subscribe(x=>Programs = x);
            
-            //TVPlayerViewModel.Instance.TopPanelVisible(true);
+            TVPlayerViewModel.Instance.TopPanelVisible(true, "Groups");
         }
 
         private void OnItemSelected()

TV Player WPF/ViewModels/ProgramsListViewModel.cs

@@ -18,7 +18,7 @@ namespace TV_Player
 
         public ProgramsListViewModel(GroupInfo groupInfo)
         {
-            TVPlayerViewModel.Instance.TopPanelVisible(true);
+            TVPlayerViewModel.Instance.TopPanelVisible(true, groupInfo.Name);
             ItemSelectedCommand = new RelayCommand(OnItemSelected);
             ProgramsData.Instance.AllPrograms.Subscribe(x => Programs = x.Where(p => p.GroupTitle == groupInfo.Name).ToList());
 

TV Player WPF/ViewModels/TVPlayerViewModel.cs

@@ -1,21 +1,19 @@
-using CommunityToolkit.Mvvm.Input;
-using System.Windows.Controls;
-using System.Windows.Input;
+using System.Windows.Controls;
 
 namespace TV_Player.ViewModels
 {
     public class TVPlayerViewModel
     {
         private readonly MainViewModel _mainViewModel;
-        
-        public Action ButtonBackAction { get; set; }       
 
-        private static TVPlayerViewModel _instance;
+        public Action ButtonBackAction { get; set; }
+
+        private static TVPlayerViewModel? _instance;
         public static TVPlayerViewModel Instance
         {
             get
             {
-                if(_instance==null)
+                if (_instance == null)
                     _instance = new TVPlayerViewModel();
                 return _instance;
             }
@@ -24,16 +22,29 @@ namespace TV_Player.ViewModels
         public TVPlayerViewModel()
         {
             _mainViewModel = new MainViewModel();
-            var mainWindow=new MainWindow();
+            var mainWindow = new MainWindow();
             mainWindow.DataContext = _mainViewModel;
-            
+
             mainWindow.Show();
             _instance = this;
-           
+
+            ShowInitialScreen();
         }
-        public void TopPanelVisible(bool value)
+
+        private void ShowInitialScreen()
+        {
+            var vm = new ProgramsGroupViewModel();
+
+            var control = new ProgramsGroupGrid();
+            control.DataContext = vm;
+
+            SetPageContext(control, vm);
+        }
+
+        public void TopPanelVisible(bool value, string title)
         {
             _mainViewModel.IsTopPanelVisible = value;
+            _mainViewModel.TopPanelTitle = title;
         }
 
         public void SetBackButtonAction(Action action)