Is System.Int32 any slower than using int?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/62503/c-int-or-int32-should-i-care">C#, int or Int32? Should I care?</a>  </p>
</blockquote>



<p>Couple of questions on System.Int32: </p>

<ol>
<li>Is there any specific technical reason why sizeof(System.Int32) is not allowed? </li>
<li>How fast or slow is System.Int32 in comparison to int type? </li>
<li>Calling System.Runtime.InteropServices.Marshal.SizeOf on a variable of type System.Int32 results in 4; how does this work? Would the size of this class be exactly same as that of int internally? </li>
</ol>
