c# - How to get a method/property description? [C#]

Question

How can I get the description of this property for example: (?)

    /// <summary>
    /// **This indicates whether the ToolTip is Activated.**
    /// </summary>
    private bool _visible
    {
        get { return rtbScript.ToolTip.Active; }
        set { rtbScript.ToolTip.Active = value; }
    }