如何使avalon面板可见

Question

我有一个使用AvalonDock的WPF项目，问题是我想在点击 MenuItem 时显示关闭面板，我现在拥有如下：

<MenuItem Header="Views（_V)">
            <MenuItem Header="SolutionViews" IsCheckable="True" IsChecked="{Binding DocumentSolutionPanel.IsVisible, Mode=TwoWay}"/>
            <MenuItem Header="HardwareConfiguration" IsCheckable="True" IsChecked="{Binding DocumentHardwarePanel.IsVisible, Mode=TwoWay}"/>
            <MenuItem Header="HardwareInfo" IsCheckable="True" IsChecked="{Binding DocumentHWInfoPanel.IsVisible ,Mode=TwoWay}"/>
            <MenuItem Header="ConfigurationInfo" IsCheckable="True" IsChecked="{Binding DocumentConfigurationPanel.IsVisible, Mode=TwoWay}"/>
            <MenuItem Header="CommunicationParam" IsCheckable="True" IsChecked="{Binding DocumentCommunicationPanel.IsVisible, Mode=TwoWay}"/>
        </MenuItem>

以DocumentSolutionPanel为例：

public class DocumentSolutionPanelViewModel : AbstractPanelViewModel
{
    public DocumentSolutionPanelViewModel()
    {

    }
}

和

public abstract class AbstractPanelViewModel : AbstractViewModel
{
    private bool isVisible = false;

    public bool IsVisible
    {
        get { return isVisible; }
        set
        {
            if (isVisible == value)
                return;

            isVisible = value;
            OnPropertyChanged("IsVisible");
        }
    }

}

和

    private DocumentSolutionPanelViewModel _documentSolutionPanel = null;
    public DocumentSolutionPanelViewModel DocumentSolutionPanel
    {
        get
        {
            if (_documentSolutionPanel == null)
                _documentSolutionPanel = new DocumentSolutionPanelViewModel();

            return _documentSolutionPanel;
        }
    }

我的代码出了什么问题？谢谢！