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PO.NET equivalent of Java's Integer.bitCount?
 

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    <p>Is there a method similar to Java's <code><a href="http://download.oracle.com/javase/6/docs/api/java/lang/Integer.html#bitCount%28int%29" rel="nofollow noreferrer">Integer.bitCount(int)</a></code> or <code><a href="http://download.oracle.com/javase/6/docs/api/java/lang/Long.html#bitCount%28long%29" rel="nofollow noreferrer">Long.bitCount(long)</a></code> anywhere in the .NET Framework?</p> <p>(For those unfamiliar with these Java methods) this is also known as:</p> <ul> <li><a href="http://en.wikipedia.org/wiki/Hamming_weight" rel="nofollow noreferrer">Hamming Weight</a></li> <li>Population Count (often called <code>POPCNT</code> when implemented in hardware.)</li> </ul> <p>Although <a href="http://www.inwap.com/pdp10/hbaker/hakmem/hacks.html#item167" rel="nofollow noreferrer">there</a> <a href="http://discuss.joelonsoftware.com/default.asp?interview.11.578648.14" rel="nofollow noreferrer">are</a> <a href="https://stackoverflow.com/questions/697978/c-code-to-count-the-number-of-1-bits-in-an-unsigned-char">plenty</a> <a href="http://bits.stephan-brumme.com/countBits.html" rel="nofollow noreferrer">of</a> <a href="http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetParallel" rel="nofollow noreferrer">implementations</a> <a href="http://www.dotnetperls.com/bitcount" rel="nofollow noreferrer">to</a> <a href="http://gurmeet.net/puzzles/fast-bit-counting-routines/" rel="nofollow noreferrer">be</a> found on the web, I was wondering if there was a standard library implementation.</p> <p>I know this is not in <code>BitArray</code>, <code>UInt32</code> or <code>BitConverter</code>, but maybe there's a version hidden somewhere, e.g. in a crypto function.</p>
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