SSIS中的源代码控制和dtsx文件的并发工作

I am working on building a new SSIS project from scratch. I want to work with couple of my teammates. I was hoping to get a suggestion on how we can have some have some source control, so that few of us can work concurrently on the same SSIS project (same dtsx file, building new packages.) Version: SQL Server Integration Service v11 Microsoft Visual Studio 2010I am working on building a new SSIS project fro