A single Visual Studio solution can be comprised of many projects. The solution created using the SQL Server Database Project template provides one COBOL Managed Class Library project; however, you might prefer to organize your code across multiple projects. For example, you could put all your stored procedure code into one managed COBOL project, and create a separate distinct COBOL Managed Class Library project in which to keep your SPD files and their associated generated COBOL wrappers. You could also add a COBOL native project that calls your stored procedure from a batch job. You might even want a separate COBOL managed project for each stored procedure!