title: Converting null literal for Console.ReadLine() for string input
body: <p>I am new to c# so i need some guidance with this.</p>
  <pre><code>string NumInput = Console.ReadLine();
  </code></pre>
  <p>in my code, this statement gives the warning of</p>
  <p>converting null literal or possible null value to non-nullable type.</p>
  <p>Is there any alternative to this code line or anything which can make this warning disapear</p>