Worked on the dotnet/SqlClient repository to enhance the reliability of batch operations by addressing error handling and resource management in C#. Focused on hardening the SqlBatch component, the work introduced safeguards against executing batches with empty command lists, thereby preventing null reference errors during runtime. By initializing the commands collection and implementing descriptive InvalidOperationException messages, the changes provided clearer failure modes for developers. Comprehensive unit tests were added to validate these behaviors and ensure future regressions are caught early. This approach improved the overall developer experience and raised the reliability of batch execution, leveraging skills in error handling and unit testing.