 <p>Use the <a href="http://msdn.microsoft.com/en-us/library/ef48waz8.aspx">overload</a> that takes a <a href="http://msdn.microsoft.com/en-us/library/system.midpointrounding.aspx"><code>MidpointRounding</code></a></p> <pre><code>Math.Round(276.5, MidpointRounding.AwayFromZero); </code></pre> <p>demo: <a href="http://ideone.com/sQ26z">http://ideone.com/sQ26z</a></p>