This implementation is not thread-safe.

The LiteDictionary implementation switches at runtime between several different sub-implementations for storing the IDictionary of objects, described here:

1. "empty dictionary" - a dictionary that contains no data;
2. "single entry" - a reference directly to a single dictionary entry;
3. "object[]" - a reference to an array of entries; the item limit for this implementation is determined by the THRESHOLD constant;
4. "delegation" - for more than THRESHOLD items, a dictionary is created to delegate the dictionary management to; sub-classes can override the default delegation class Hashtable by overriding the factory method InstantiateDictionary()()()().

The LiteDictionary implementation supports the null key value.