Question

Trying to avoid the FxCop warning ‘Do not raise reserved exceptions’ from a C++/CLI library so I decided to break down and write my own exception type.

[Serializable]
public ref class CaptureException : public Exception
{
public:
    CaptureException() : Exception() {}
    CaptureException(String^ message) : Exception(message) {}
    CaptureException(String^ message, Exception^ inner) : Exception(message, inner) {}
protected:
    CaptureException(System::Runtime::Serialization::SerializationInfo^ info, System::Runtime::Serialization::StreamingContext^ context) : Exception(info, context) {}
};

This doesn’t compile stating

error C2664: 'System::Exception::Exception(System::String ^,System::Exception ^)' : cannot convert parameter 1 from 'System::Runtime::Serialization::SerializationInfo ^' to 'System::String ^'

I’m not sure why I’m getting this error. Does the C++/CLI not have the full exception class? I’m just trying to implement the standard constructors for my exception and in C# it looks like this and compiles fine.

[Serializable]
public class CaptureException : Exception
{
    public DatabaseConnectionException() { }
    public CaptureException (string message) : base(message) { }
    public CaptureException (string message, Exception inner) : base(message, inner) { }
    protected CaptureException (
      System.Runtime.Serialization.SerializationInfo info,
      System.Runtime.Serialization.StreamingContext context)
        : base(info, context) { }
}

Answer 1

StreamingContext is a value type (i.e. a struct), so you’ll want to remove the hat ^:

    CaptureException(System::Runtime::Serialization::SerializationInfo^ info, System::Runtime::Serialization::StreamingContext context) : Exception(info, context) 
{}