c# - Resourse.designer.cs can't rebuild android Xamarin? -

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today trying make start in programming android in c# using xamarin. however, when go docs , follow example play audio (here link audio docs). when add line of code:

    _player = mediaplayer.create(this, resource.raw.test);

i error:

    e:\android apps\hardcore_gabber_app\hardcoregabberapp\mainactivity.cs(48,48): error cs0117: 'hardcoregabberapp.resource' not contain definition 'raw' (cs0117) (hardcoregabberapp)

and how have folders:

folder

and still cant find "raw". deleting recourse.designer.cs , rebuild not working. getting more errors , recourse.designer.cs not rebuilding. how can fix this?

it seemed had add files manually adding right clicking on folder , press add files instead of drag , drop fix issue: this


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