In TFS2008, deleting a build removes it from the database itself. If you delete a build called Build_20110423.1 or 1.0.0.1 from Build Explorer and trigger the build again then you will see that new builds starts with same number (Build_20110423.1 or 1.0.0.1) but not with an incremental number (Build_20110423.2 or 1.0.0.2). But, it doesn’t work the same way in TFS2010. I queued a build in TFS2010 which got failed with Build Number 1.0.14.0 due to compilation errors. I wanted to reuse the same build ......