I'm cleaning up old build definitions and I want to back them up in case there is something I'm missing, is there a way to export the build definitions using Visual Studio 2010?
Sean Lynch
You could use the TFS API to export it to a format that you could load it back in with like in How to Move TFS 2010 Build Definition between Projects? .
Team Foundation Power Tools commands has a command that will allow one to export/dump out a build definition to a text file.
From the Visual Studio command prompt:
C:\Program Files\Microsoft Visual Studio 10.0\VC>tfpt builddefinition /dump ProjectName\BuildDefinitionName /filepath:C:\filename.txt /collection:uri
来源：https://stackoverflow.com/questions/5107824/is-it-possible-to-export-tfs-2010-build-definitions