Using visual studio - no devices found

Hi,

Thought I'd try building an app to get up to speed on VS.

Loaded a github project into a workspace and verified install is correct using command.

Tried a build and it said no devices available.

SDK manager opens fine. Path for SDK doesn't contain spaces ..

Command Edit Project/Products says manifest is in wrong format (builds fine in eclipse)

Guidance welcome.

Regards,

David