title: First time exception - System.pdb not loaded
body: <p>I use VS2017 and I get the following when I hit F5</p>
  
  <p><a href="https://i.stack.imgur.com/vnY2E.png" rel="noreferrer"><img src="https://i.stack.imgur.com/vnY2E.png" alt="enter image description here"></a></p>
  
  <p>It happens for certain projects only, even if I disabled the Symbols support under VS options. Although in the past, for the same projects it used not to throw even with Symbol support enabled. </p>
  
  <p>So, since I assumed this must be some kind of cached VS setting project specific, I deleted bin, obj, .vs , SymbolSource folders but the same. </p>
  
  <p>If I enable Just My Code it does not throw, however this is not what I want since I cannot debug assemblies which I already have the symbols. </p>
  
  <p>As far as I know even if Symbols Support is enabled it shouldn't throw if there isn't a related Symbol Server declared in VS Options.</p>
  
  <p>This behavior is not specific only to System.dll but happens even if I attach to external processes which I do not have symbols, meaning that filtering with the Load Only Specified Module VS option again is not what I am looking for. </p>
  
  <p>So, does anybody have an idea on how to avoid such annoying exceptions while allowing to utilize Symbol Support for other assemblies which I have configured.  </p>