Build only a startup project, not the whole solution regardless of the current project in the editor. Dependent projects are also built.
Shift+F6 builds the current one, but in some cases you always want to build the start one regardless of the current project in the editor. This is useful for C++ solutions which contains many projects.
"Build Only Start Project" is added on the Build menu. You can assign a keyboard shortcut. This extension doesn't change your key bindings.
If you want to assign a key, the command name is "Build.BuildOnlyStartupProject". Go to Visual Studio -> settings -> environment -> keyboard.