Does TFS 2010 have the concept of checking out work items and checking them in. This action would lock the item for edit by other users while it is checked out.
I know I can do this for files under source control, but what about regular work items?
I haven't yet come across any documentation around this. If it's possible, does someone have a code sample?
That is not possible. In TFS11 we have added 'merge on save' so there are less conflicts when saving a work item.
Would love to know why you want this feature though.