How C# handles workload with using statement? : <p>I am currently cleaning up the code for my project and trying to improve its performance. As a part of improvement, I thought of removing unused "using" statements from all files. I would like to figure out if that would indeed improve the performance, so here is my question.</p>

<p>Through the "using" statement, is an external library/resource loaded when <strong>any method from the file is executed</strong> (READ: When file itself is loaded) OR the external library is loaded <strong>only when calling a specific method is actually using this library</strong>?</p>
