Server Reference Guide > Server Reference Guide > .NET Interface > Differences between .NET and Java Interfaces > Representation of Null Values
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Representation of Null Values
In the Java interface, a null object reference maps to the VT_NULL VARIANT value. This allows null OpenROAD values to be represented conveniently as null Java object references.
Unfortunately, the .NET COM interoperability layer maps null .NET object references to VT_EMPTY. VT_NULL is mapped to a special object type of class System.DBNull.
Last modified date: 12/20/2023