If you want to use IIS Express and allow external access, you need to explicitly change the bindings in the solution applicationhost.config file which can be found in <solutionRoot>\.vs\config.
Change the bindingInformation to:
<site name="AlbumViewerNetCore" id="2">
<application path="/" applicationPool="Clr4IntegratedAppPool">
<virtualDirectory path="/" physicalPath="C:\projects2010\AlbumViewerVNext\src\AlbumViewerNetCore" />
</application>
<bindings>
<binding protocol="http" bindingInformation="*:26448:*" />
</bindings>
</site>
changing the *:26448:localhost
to *:26448:*
where 26448 is the IIS Express port.
Then run:
netsh http add urlacl url=http://*:26448/ user=Interactive listen=yes
to bind the http.sys entry.
Finally open the firewall to allow inbound connections to the specific IIS Express port:
netsh advfirewall firewall add rule name="Http Port 26448" dir=in action=allow protocol=TCP localport=26448
and you should be off to the races.