Worked on the dotnet/orleans repository to improve the reliability of the transaction subsystem by addressing a concurrency issue in transaction management. Focused on fixing a race condition in the TransactionInfo.Fork method, the developer replaced a direct increment of the PendingCalls variable with the thread-safe Interlocked.Increment operation. This change ensured atomic updates under concurrent workloads, reducing the risk of incorrect transaction counts and enhancing overall framework stability. The work demonstrated strong skills in C#, concurrency control, and distributed systems, with careful attention to code-level traceability and maintainability through clear commit messaging and targeted, high-impact bug resolution.