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Compiler Error C3197

'keyword' : can only be used in definitions

A keyword was used in a declaration but is only valid in a definition.

The following sample generates C3197:

// C3197.cpp
// compile with: /clr /c
ref struct R abstract;   // C3197
ref struct R abstract {};   // OK

public ref class MyObject;   // C3197
ref class MyObject;   // OK
public ref class MyObject {};   // OK
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