Enum types cannot be nullable

The underlying type that is used to declare an enumeration cannot be a nullable value type. For example, the following code causes this error:

'' Not valid.  
' Enum exampleEnum As Integer?  
'     Member declarations.  
' End Enum  

Error ID: BC32129

To correct this error

• Do not use a nullable value type as the underlying type in an Enum declaration.

See also

• Nullable Value Types
• Enum Statement