title: default(Nullable(type)) vs default(type)
body: <p>In C#, is there a difference between <code>default(Nullable&lt;long&gt;)</code> (or <code>default(long?)</code>) and <code>default(long)</code> ? </p>
  
  <p><code>Long</code> is just an example, it can be any other <code>struct</code> type.</p>