TFS Version Control Offline

Each time i get latest version from the version control i found that the solution is on version control but it is offline. How can i bring it onl开发者_运维百科ine so i can check out and check in? By the way, I use TFS 2010 and VS 2010

---

The normal solution is "File > Source Control > Go Online", even though that can lead to some issue in some instances.

But an offline status should mean that the TFS server is somehow unavailable (more details in the SO question "Work offline in Team Foundation Server").
See also TFS 2010 In Offline Mode.

---

At the top of the the Solution Navigator window you should then see an icon like a PC and a server, with a green arrow pointing from the former to the latter. Clicking that should be the easiest way to reconnect.