Exception for missing data

Question

I was wondering what kind of exception should one throw for missing data. For example if an xml node doesn\'t contain data. It would be easy to \"throw new Exception(...

Answer 1

For a general missing data scenario, where the data is referenced by a unique ID, then the KeyNotFoundException might be appropriate - e.g.

throw new KeyNotFoundException($"Expected record for key {key} not found.");

It is in the System.Collections.Generic namespace.