Compiler Warning C4694
Collapse the table of content
Expand the table of content
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here. ArchiveDisclaimer

Compiler Warning C4694

'class_1': a sealed abstract class cannot have a base-class 'base_class'

An abstract and sealed class cannot inherit from a reference type; a sealed and abstract class can neither implement the base class functions nor allow itself to be used as a base class.

For more information, see abstract (Visual C++), sealed, and Classes and Structs (Managed).

The following sample generates C4694.

// C4694.cpp
// compile with: /c /clr
ref struct A {};
ref struct B sealed abstract : A {};   // C4694
© 2016 Microsoft