Adding Projects and Solutions to Version Control from Solution Explorer
When a solution or project is added to version control by using Solution Explorer, or when version-controlled items are otherwise bound to Visual Studio (see How to: Bind and Unbind Projects and Solutions), version-controlled items are integrated with Solution Explorer. Visual Studio displays version control status icons which appear to the left of the items in the solution. Additional menu items specific to version control are also added.
The version control status icons are described in the following table:
Represents an item whose Team Foundation version control state is unknown.
Represents an item that is under Team Foundation version control and has no pending changes against it.
Represents an item for which the current user has a pending change in their current workspace.
Represents an item that is not currently on the version control server, but is being added to version control by the current user (has a pending change of add).