compiler-error-c3807.md

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Learn more about: Compiler Error C3807	Compiler Error C3807	11/04/2016	C3807	C3807	7e2b0aab-8c61-4e71-b9c1-fcaeb6a1b5ea

Compiler Error C3807

'type' : a class with the ComImport attribute cannot derive from 'type2', only interface implementation is allowed

A type that derived from xref:System.Runtime.InteropServices.ComImportAttribute can only implement an interface.

Example

The following sample generates C3807.

// C3807.cpp
// compile with: /clr /c
ref struct S {};
interface struct I {};

[System::Runtime::InteropServices::ComImportAttribute()]
ref struct S1 : S {};   // C3807
ref struct S2 : I {};