why not be able to delete objects when expanded?

WD7UVN_SzTGUI_2023242.Client.WPF/ViewModels/GetAllEmployeesViewModel.cs

@@ -16,10 +16,18 @@ namespace WD7UVN_SzTGUI_2023242.Client.WPF.ViewModels
         public Employee SelectedEmployee
         {
             get { return selectedEmployee; }
-            set { SetProperty(ref selectedEmployee, value); (UpdateEmployeeCommand as RelayCommand).NotifyCanExecuteChanged(); }
+            set
+            {
+                SetProperty(ref selectedEmployee, value);
+                (UpdateEmployeeCommand as RelayCommand).NotifyCanExecuteChanged();
+                (DeleteEmployeeCommand as RelayCommand).NotifyCanExecuteChanged();
+                (GetSubordinatesCommand as RelayCommand).NotifyCanExecuteChanged();
+            }
         }
 
         public ICommand UpdateEmployeeCommand { get; set; }
+        public ICommand DeleteEmployeeCommand { get; set; }
+        public ICommand GetSubordinatesCommand { get; set; }
 
         public static bool IsInDesignMode
         {
@@ -34,7 +42,7 @@ namespace WD7UVN_SzTGUI_2023242.Client.WPF.ViewModels
         {
             if (!IsInDesignMode)
             {
-                Employees = new RestCollection<Employee>("http://localhost:5000/", "api/Employee", "hub");
+                Employees = new RestCollection<Employee>("http://localhost:5000/", "api/GetSubordinates", "hub");
 
                 UpdateEmployeeCommand = new RelayCommand(() =>
                 {
@@ -44,6 +52,15 @@ namespace WD7UVN_SzTGUI_2023242.Client.WPF.ViewModels
                 {
                     return SelectedEmployee != null;
                 });
+
+                DeleteEmployeeCommand = new RelayCommand(() =>
+                {
+                    Employees.Delete(SelectedEmployee.ID);
+                },
+                () =>
+                {
+                    return SelectedEmployee != null;
+                });
             }
         }
     }

WD7UVN_SzTGUI_2023242.Client.WPF/Windows/GetAll/GetAllEmployees.xaml

@@ -74,6 +74,8 @@
 
         <UniformGrid Rows="2" Grid.Row="1">
             <Button Content="Edit selected" Command="{Binding UpdateEmployeeCommand}"/>
+            <Button Content="Delete selected" Command="{Binding DeleteEmployeeCommand}"/>
+            <Button Content="Get subordinates"/>
             <Button Content="Create new" Click="CreateNewEmployee" />
         </UniformGrid>
     </Grid>