When would you use a List<KeyValuePair<T1, T2>> instead of a Dictionary<T1, T2>?

c#, dictionary

Solution

When you don't need fast lookups on key - maintaining the hashtable used by `Dictionary` has a certain overhead.

Problem

What is the difference between a List of KeyValuePair and a Dictionary for the same types? Is there an appropriate time to use one or the other?

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