Question

In .NET can I use any string as a dictionary key? This is part of a templating engine and I’m planning allow users to add their custom headers and values.

Headers will be something like “Value of X” or “Summary of Analyse & XYZ Reports”, I’m worried if they would get an exception in a rare character or something like that.

I assume there size limit but expecting it to be larger than 256 characters. MSDN hasn’t got any details on the subject.

Answer 1

Yes, it can use any valid string (which is limited to a couple billion bytes).

BTW, you might pass a custom IEqualityComparer<T> that you might pass to the Dictionary constructor which might require a maximum limit.