title: How to add a resource file to Visual Studios so that it's visible in "Select Resource" dialog?
body: <p>In Visual Studio you can edit image of a button control using the GUI editor (aka "designer"). </p>
  
  <p>I want to organize my resources into two <code>*.resx</code> files placed in the "Properties" folder of the project. My problem is that the "Select Resource" dialog in Visual Studio is only displaying the "Properties\Resources.resx" file, and none of other <code>*.resx</code> files. </p>
  
  <p>How can i add a file to the "Project resource file" drop down? If can't, why is it a drop down select than?</p>
  
  <p><a href="https://i.stack.imgur.com/6PFod.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6PFod.png" alt="enter image description here"></a></p>