In Visual Studio, the default check-in action is resolve, e.g.

This may be an issue as once a task has been implemented, a developer may wish to pass this task to another developer for code review prior to resolving the issue. Instead, when the code is checked-in, we want to associate the code with the task rather than resolve the task.

You can modify this behaviour by changing a registry setting. Change the following key’s value to False.

HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\11.0\TeamFoundation\SourceControl\Behaviour\ResolveAsDefaultCheckinAction