gtk-sharp 2.10.0.0 Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details. Convenient message window presents a with an image representing the (Error, Question, etc.) alongside some message text. It is available as a convenience. You could construct the equivalent of from without too much effort, but saves typing. The is displayed using , which automatically makes the modal and waits for the user to respond to it. returns when any in the is clicked or the is closed. After returns, you are responsible for hiding (using ) or destroying (using ) the dialog if you wish to do so. A simple message dialog MessageDialog md = new MessageDialog (parent_window, DialogFlags.DestroyWithParent, MessageType.Error, ButtonsType.Close, "Error loading file"); int result = md.Run (); md.Destroy(); A yes/no message dialog MessageDialog md = new MessageDialog (parent_window, DialogFlags.DestroyWithParent, MessageType.Question, ButtonsType.YesNo, "Are you sure you want to quit?"); ResponseType result = (ResponseType)md.Run (); if (result == ResponseType.Yes) Application.Quit(); else md.Destroy(); If you would like the to not be modal, set the property to . md.Modal = false; Gtk.Dialog Constructor Internal constructor Pointer to the C object. This is an internal constructor, and should not be used by user code. Constructor System.ParamArray Creates an instance of the dialog's parent (or ) the the type of message dialog to display the buttons to display the message format string optional arguments for Creates an instance of MessageDialog md = new MessageDialog (parent_window, Gtk.DialogFlags.DestroyWithParent, Gtk.MessageType.Error, Gtk.ButtonsType.Close, "Error loading file '{0}'", filename); Constructor System.ParamArray Creates an instance of the dialog's parent (or ) the the type of message dialog to display the buttons to display whether or not uses Pango markup the message format string optional arguments for Like the other constructor, but allows you to pass a non-marked-up string. Property Gtk.MessageType The of the an object of type The of the GLib.Property("message-type") Property GLib.GType GType Property. a Returns the native value for . Constructor Protected Constructor. a Chain to this constructor if you have manually registered a native value for your subclass. System.Obsolete Property System.String Markup for the message to display in the dialog. a Markup should be in Pango markup format. (TODO: check this.) Constructor To be added To be added Property GLib.Property("image") Gtk.Widget The image displayed in the MessageBox. a displayed in the image location. Property GLib.Property("use-markup") System.Boolean Indicates if Pango markup is handled in the primary text. if , markup is parsed. See for more info. Property GLib.Property("text") System.String The primary text displayed in the MessageBox. the primary text string. If the box has secondary text, this is displayed as the Title. Property GLib.Property("secondary-use-markup") System.Boolean Indicates if Pango markup is handled in the secondary text.. if , markup is parsed. See for more info. Property GLib.Property("secondary-text") System.String The secondary message for the MessageBox. defaults to .