title: Why am I able to use System.Collections.Generic namespace without having a reference to any assembly?
body: <p>I removed all references from the <em>References</em> node but I am still able to use <code>System.Collections.Generic</code> namespace. Why? Is it because Visual Studio somehow adds them by default? But if that is the case, I should be able to see it my <em>.csproj</em> file at least. </p>
  
  <p>What's going on here?</p>
  
  <p><a href="https://i.stack.imgur.com/x0pox.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/x0pox.png" alt="enter image description here"></a></p>