gtk-sharp 2.6.0.0 >Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details. An attribute to identify a property as a tree node column value. This attribute is applied to a property of a tree node class to indicate that the property holds a column value of the node. In the following example, the Frombulator property is tagged as Column 2 of the node which implements it: [TreeNodeValue(Column=2)] public string Frombulator { get { return frombulator; } } System.Attribute System.AttributeUsage(AllowMultiple=True, Inherited=True, ValidOn=System.AttributeTargets.Property|Field) Constructor TreeNodeValueAttribute constructor Instantiates a Property System.Int32 Column named value a The column number of the value which is exposed by the property this marks.