Class has disappeared from class library

I posted this yesterday but it never got through so am trying again ...

Hi all

I had a visual class library containing one class. This morning something has happened which is of great concern - the class library (VCX/VCT) is still there but it is empty - the class it contained has vanished. Is there any way it might be lurking in a temporary file somewhere? Any idea what might have happened? All suggestions gratefully received.

Many thanks

Paul Newton

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