I have a class that is implementing a custom ToolStripItem. Everything seems to work great until I try to add the item to a ContextMenuStrip at design time. If I try to add my custom control straight from the ContextMenuStrip the PropertyGrid freezes up and will not let me modify my Checked or Text properties. But if I go into the ContextMenuStrip PropertyGrid and add my custom control through the Items(...) property, I can modify the custom control just fine within that dialog. I'm not sure if I'm missing an attribute somewhere of if its a problem with the underlying code. Here is a copy of the CustomToolStripItem class. As you can see, its a very simple class.

[ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.ContextMenuStrip)]
public class CustomToolStripItem : ToolStripControlHost {

    #region Public Properties

    [Description("Gets or sets a value indicating whether the object is in the checked state")]
    [ReadOnly(false)]
    public bool Checked { get { return checkBox.Checked; } set { checkBox.Checked = value; } }

    [Description("Gets or sets the object's text")]
    [ReadOnly(false)]
    public override string Text { get { return checkBox.Text; } set { checkBox.Text = value; } }

    #endregion Public Properties

    #region Public Events

    public event EventHandler CheckedChanged;

    #endregion Public Events

    #region Constructors

    public CustomToolStripItem()
        : base(new FlowLayoutPanel()) {
        // Setup the FlowLayoutPanel.
        controlPanel = (FlowLayoutPanel)base.Control;
        controlPanel.BackColor = Color.Transparent;

        // Add the child controls.
        checkBox.AutoSize = true;
        controlPanel.Controls.Add(checkBox);

        ContextMenuStrip strip = new ContextMenuStrip();
    }

    #endregion Constructors

    #region Protected Methods

    protected override void OnSubscribeControlEvents(Control control) {
        base.OnSubscribeControlEvents(control);
        checkBox.CheckedChanged += new EventHandler(CheckChanged);
    }

    protected override void OnUnsubscribeControlEvents(Control control) {
        base.OnUnsubscribeControlEvents(control);
        checkBox.CheckedChanged -= new EventHandler(CheckChanged);
    }

    #endregion Protected Methods

    #region Private Methods

    private void CheckChanged(object sender, EventArgs e) {
        // Throw the CustomToolStripItem's CheckedChanged event
        EventHandler handler = CheckedChanged;
        if (handler != null) { handler(sender, e); }
    }

    #endregion Private Methods

    #region Private Fields

    private FlowLayoutPanel controlPanel;
    private CheckBox checkBox = new CheckBox();

    #endregion Private Fields
}