title: How to round up value C# to the nearest integer?
body: <p>I want to round up double to int.</p>
  
  <p>Eg,</p>
  
  <pre><code>double a=0.4, b=0.5;
  </code></pre>
  
  <p>I want to change them both to integer.</p>
  
  <p>so that </p>
  
  <pre><code>int aa=0, bb=1;
  </code></pre>
  
  <p><code>aa</code> is from <code>a</code> and <code>bb</code> is from <code>b</code>.</p>
  
  <p>Any formula to do that?</p>