Friday, October 19, 2007

Implicit conversions

I'm working on a project where request and response messages are serialized before sending across the wire. We do this by calling an override of ToString(). So a line in the code might look like
    response = myProvider.ProcessMessage(myMessage.ToString());

If I try to type
    response = myProvider.ProcessMessage(myMessage);

I get a build error stating that it cannot implicitly convert type 'SomeCoolMessage' to 'string.' So, what if I want to implicitly convert between the two? In the SomeCoolMessage class I add a new operator

    public static implicit operator string(SomeCoolMessage m)
return m.ToString();

Now I can write
    response = myProvider.ProcessMessage(myMessage);

and everything just works.

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