WPF контекстное меню для ListBox MVVM

[Нике]

Пробовала делать через делегаты и ICommand (прописываладля каждого итем команду), но все равно не хочет

 <ListBox HorizontalContentAlignment="Stretch" 
                 ItemTemplate="{DynamicResource UserListBoxItemTemplate}" 
                 ItemsSource="{Binding}" Margin="0,71,0,0" Name="lstAllUsers" 
                 SelectionMode="Extended" Grid.ColumnSpan="3"
                >               
                <ListBox.ContextMenu>
                    <ContextMenu>
                    <MenuItem Command="{Binding RemoveUserCommand}" Header="Remove user" />
                </ListBox.ContextMenu>
            </ListBox>

 private DelegateCommand removeUser;
        public ICommand RemoveUserCommand
        {
            get
            {
                if (removeUser == null)
                {
                    removeUser = new DelegateCommand(RemoveUser);
                }
                return removeUser;
            }
        }
        private void RemoveUser()
        {
            int nSelected = this.UserControlList.lstAllUsers.SelectedIndex;
            ((User)this.UserControlList.lstAllUsers.SelectedItem).Status = 2;
            if (nSelected - 1 >= 0)
                this.UserControlList.lstAllUsers.SelectedIndex = nSelected - 1;
            else if (nSelected - 1 <= 0 && this.UserControlList.lstAllUsers.Items.Count != 0)
                this.UserControlList.lstAllUsers.SelectedIndex = nSelected;

            this.UserControlList.lstAllUsers.Items.Refresh();
        }