Question

What is the difference between the following declarations (in C++/CLI):

public interface class IC {};

public interface struct IS {};

Similar situations:

public enum class EC {};

public enum struct ES {};

?

Answer 1

They are identical.

For details, see MSDN’s interface class reference, under Remarks:

interface struct is equivalent to interface class.

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I believe Microsoft decided to allow both options just to keep consistency with ref class/ref struct and value class/value struct. However, since interfaces don’t have private members, for interface, the two statements become exactly the same.