SortedList<>, SortedDictionary<> and Dictionary<>

Question

I find that SortedList SortedDictionary and Dictionary implement the same

Answer 1

To summarize the results of a Performance Test - SortedList vs. SortedDictionary vs. Dictionary vs. Hashtable, the results from best to worst for different scenarios:

Memory Usage:

SortedList
Hashtable
SortedDictionary
Dictionary

Insertions:

Dictionary
Hashtable
SortedDictionary
SortedList

Search Operations:

Hashtable
Dictionary
SortedList
SortedDictionary

foreach loop operations

SortedList
Dictionary
Hashtable
SortedDictionary