title: get name of a variable or parameter
body: <p>I would like to get the name of a variable or parameter:</p>
  
  <p>For example if I have: </p>
  
  <pre><code>var myInput = "input";
  
  var nameOfVar = GETNAME(myInput); // ==&gt; nameOfVar should be = myInput
  
  void testName([Type?] myInput)
  {
     var nameOfParam = GETNAME(myInput); // ==&gt; nameOfParam should be = myInput
  }
  </code></pre>
  
  <p>How can I do it in C#?</p>