"Verbose Dictionary" in C#, 'override new' this[] or implement IDictionary
- by Benjol
All I want is a dictionary which tells me which key it couldn't find, rather than just saying The given key was not present in the dictionary.
I briefly considered doing a subclass with override new this[TKey key], but felt it was a bit hacky, so I've gone with implementing the IDictionary interface, and passing everything through directly to an inner Dictionary, with the only additional logic being in the indexer:
public TValue this[TKey key]
{
get
{
ThrowIfKeyNotFound(key);
return _dic[key];
}
set
{
ThrowIfKeyNotFound(key);
_dic[key] = value;
}
}
private void ThrowIfKeyNotFound(TKey key)
{
if(!_dic.ContainsKey(key))
throw new ArgumentOutOfRangeException("Can't find key [" + key + "] in dictionary");
}
Is this the right/only way to go? Would newing over the this[] really be that bad?
