TFS & VS2012: An item with the same key has already been added.

I have been adding work items to Team Foundation Service using web browser.  When I try to open the newly work items, I get the error “An item with the same key has already been added”.

Simply deleted all the files in the following folder and restart VS2012:

C:\Users\[USERNAME]\AppData\Local\Microsoft\Team Foundation\4.0\Cache

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3 thoughts on “TFS & VS2012: An item with the same key has already been added.

  1. Thank you,
    This Issue is occurring due to change in work-item template.
    and deleting the cache resolves the issue

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