title: What does "SKU" (attribute) mean in C#?
body: <p>Today I encountered with the line </p>
  
  <p><code>&lt;supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5"/&gt;</code> </p>
  
  <p>in my <code>App.config</code> file which caused <a href="https://stackoverflow.com/questions/14745787/to-run-this-application-you-first-must-install-net-4-5">errors</a> with framework when the <code>sku</code> attribute was included. Although, I searched a lot I couldnt really find out what <code>SKU</code> means (other than the definitions "stock keeping unit" or "Shelf Keeping Unit" which I dont think are related to this case).</p>
  
  <p>In short, what does SKU mean/stand for ?</p>