A generic, thread-safe object pool that manages a fixed number of reusable items. It supports asynchronous acquisition, lease-based usage via IDisposable, and configurable pool capacity. The implementation uses a concurrent queue and manual reset events for efficient blocking. This pattern can be extracted and reused in any .NET project requiring pooled resources (e.g., connections, buffers, network streams).

An abstract base class for implementing configurable retry logic with sync/async execution methods. It defines a contract for retry providers that can handle transient exceptions, with the ability to define retry intervals via SqlRetryIntervalBaseEnumerator (fixed, incremental, exponential). The design is cleanly separated from the retry logic itself, making it suitable for reuse in any database or network client library.

A factory implementing the Inflatable/Deflatable token pattern for TDS protocol messages. It provides centralized deserialization of TDS token streams into strongly-typed token objects, supporting extensibility via token type registration. Although part of the test infrastructure, the factory pattern and token hierarchy are isolated and could be reused to build custom TDS servers, protocol analyzers, or testing tools for SQL Server communication.