Specifies whether this property definition is internal (not displayed in the class documentation). .
To specify that this property is internal, use the following syntax:
Property propertyname As classname [ Internal ];
Otherwise, omit this keyword or place the word Not
immediately before the keyword.
class members are not displayed in the class documentation. This keyword is useful if you want users to see a class but not see all its members.
If you omit this keyword, this property is displayed in the class documentation.