title: TargetedPatchingOptOut: "Performance critical to inline across NGen image boundaries"?
body: <p>Been going through some framework classes using reflector and noticed a number of the methods and properties have the following attribute </p>
  
  <pre><code>[TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")]
  </code></pre>
  
  <p>I'm pretty sure I have also seen the above comment somewhere else and never followed it up. </p>
  
  <p>Could someone please tell me what this means in the C# and any other context?</p>