1. When I try to associate work item with a check-in I get the list of all work items . But I want to change work item template so that only specific work items in specific states can be associated with check-in. How to achieve this

2. While changing the work item type template can I add more fields and refnames What should I do to make these appear on work item list

'Associate' is the checkin action that can be applied to all work item types, and this is not configurable.

You can modify the template and define your own fields. Please note though that modifying the template will have no immediate effect on existing work item types, since templates are only used for new projects creation. However, you can modify any existing work item type, too. See the "Administering Work Item Types" topic in MSDN.

Thanks,

Alex

Does it mean I can associate a closed bug with a Check-in and there is no way to restrict this Or is there a way showing some alert while trying to associate a closed bug with Check-in

Many Thanks

That's correct - there's no way to restrict that. From my point of view associating a work item with a checkin is harmless - it cannot be compared with resolving a work item, which changes its state; whenever "resolve" operation is applicable to a work item in its state is configurable through the work item type definition XML.

Thanks,

Alex