Apply an "is null" constraint to the named property
            
Namespace: NHibernate.CriterionAssembly: NHibernate (in NHibernate.dll) Version: 3.2.0.4000 (3.2.0.4000)
Syntax
| C# | 
|---|
public static AbstractCriterion IsNull( string propertyName )  | 
| Visual Basic | 
|---|
Public Shared Function IsNull ( _ propertyName As String _ ) As AbstractCriterion  | 
| Visual C++ | 
|---|
public: static AbstractCriterion^ IsNull( String^ propertyName )  | 
Parameters
- propertyName
 - Type: System..::..String
The name of the Property in the class.