Why is there no Dictionary.TrimExcess()?

Question

In .NET, there is a constructor for Dictionary that takes one parameter, int capacity. This is the same as with many other collecti

Answer 1

I'd guess that in this case the capacity argument helps define the hashing function as well as the number of buckets; resizing/trimming a sparse collection of data would require recalculating hashes of all of the stored items remaining.