title: Need to know about the usage of #if in C#
body: <p>I am using C#. Need to know about the usage of #if.
  The code details is:</p>
  
  <pre><code>#if
      //logic code
  #else
      //logic code
  #endif
      //logic code
  </code></pre>
  
  <p>I cant understand how its working in  debugging mode.
  Waiting for quick response. Thanks in advance.</p>