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illegal expression for named attribute argument 'field'
When initializing a named attribute argument, the value must be a compile time constant.
For more information on attributes, see User-Defined Attributes.
Example
The following sample generates C3101.
// C3101.cpp
// compile with: /clr /c
ref class AAttribute : System::Attribute {
public:
int Field;
};
extern int i;
[assembly:A(Field = i)]; // C3101
[assembly:A(Field = 0)]; // OK