See here for details: http://steve.emxsoftware.com/NET/Overloading+the++and++operators

Namespace:  NHibernate.Expression
Assembly:  NHibernate (in NHibernate.dll)

Syntax

Visual Basic (Declaration)
Public Shared Operator IsFalse ( _
	criteria As AbstractCriterion _
) As Boolean
C#
public static bool operator false(
	AbstractCriterion criteria
)
Visual C++
Visual C++ does not support this operator.
JavaScript
JavaScript does not support overloaded operators.

See Also