The unset / default value for the date is Date.MinValue. So if the date is not Date.MinValue then the constraint passes.

Namespace: DatabaseObjects.Constraints
Assembly: DatabaseObjects (in DatabaseObjects.dll) Version: 3.8.1.0

Syntax

C#
public DateIsSetConstraint()
Visual Basic
Public Sub New
Visual C++
public:
DateIsSetConstraint()

See Also