Why doesn't HashTable.Contains() just simply return false if it is passed a null?
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by Nate Pinchot
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Published on 2010-06-16T13:35:11Z
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2010/06/16
13:42 UTC
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I understand why passing a null to HashTable.Contains() doesn't work, but I don't understand what the point of it throwing an ArgumentNullException is - instead of just simply returning false? What is the benefit of throwing the exception (other than to make me do null checks before calling .Contains())?
Caused By [System.ArgumentNullException]
Key cannot be null.
Parameter name: key
at System.Collections.Hashtable.ContainsKey(Object key)
at System.Collections.Hashtable.Contains(Object key)
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