MapField`2 Representation of a map field in a Protocol Buffer message.

 RepeatedField`1 The contents of a repeated field: essentially, a collection with some extra restrictions (no null values) and capabilities (deep cloning).

 Lists Utility to compare if two Lists are the same, and the hash code of a List.

 ProtobufEqualityComparers Provides a central place to implement equality comparisons, primarily for bitwise float/double equality.