visual studio - How do I fix this 'namespace not found error'? -

visual studio - How do I fix this 'namespace not found error'? -

i using visual studio 2013 windows version 12.0.30723.00 update 3; adding lumia sensorcore sdk develop app. programme complains, 'the type or namespace name 'lumia' not found (are missing using directive or assembly reference?).

i have added reference image shows. in mainpage.xaml.cs, there wiggly under lumia.sense. can see lumia.sense in references folder can see in object browser.

how can prepare this?

from error message looks it's looking @ other project in solution hellosensorsharp.windows not hellosensorsharp.windowsphone one. check reference in first project , create sure assembly exists , referenced.

visual-studio