Classes
C# uses the class
statement along with opening and
closing braces, { }, to indicate the beginning and end of a
class definition. For example:
public class DataException : SystemException { // Member definitions }
In VB, a class definition is indicated by the
Class
... End
Class
construct:
Public Class DataException Inherits SystemException ' member definitions End Class
In addition, C# classes can be marked as abstract
or sealed
; these correspond to the VB
MustInherit
and NonInheritable
keywords, as shown in Table A-2.
Table A-2. C# and equivalent VB class modifiers
C# keyword |
VB keyword |
---|---|
|
|
|
|
C# uses the colon to indicate either inheritance or interface
implementation. Both the base class and the implemented interfaces
are part of the class
statement. For example:
public class DataSet : MarshalByValueComponent, IListSource, ISupportInitialize, ISerializable
In VB, the base class and any implemented interfaces are specified on
separate lines immediately following the Class
statement. A class’s base class is indicated by
preceding its name with the Inherits
keyword; any
implemented interfaces are indicated by the
Implements
keyword. Hence, the previous definition
of the DataSet
class in C# would appear as follows
in VB:
Public Class DataSet Inherits MarshalByValueComponent Implements IListSource, ISupportInitalize, ISerializable
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