Visual Basic 2015 Unleashed

Enumerations and the Common Language Specification

When introducing enumerations, you learned that they support only numeric types. There is another limitation if you plan to implement CLS-compliant enumerations. Only CLS-compliant types can characterize CLS-compliant enumerations; therefore, the SByte, UShort, UInteger, and ULong types cannot be used within CLS-compliant enumerations. The following is an example of a CLS-compliant enumeration:

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<Flags()> Public Enum ClsCompliantEnum As Byte    FirstValue = 0    SecondValue = 1    ThirdValue = 2End Enum

Note

In CLS-compliant enumerations, decorating an Enum with the Flag attribute indicates to the compiler that the enumeration has to be considered as a set of bit ...