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Editorial Team
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Asked: 2026-05-21T20:44:25+00:00

Is there a method similar to Java’s Integer.bitCount(int) or Long.bitCount(long) anywhere in the .NET

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Is there a method similar to Java’s Integer.bitCount(int) or Long.bitCount(long) anywhere in the .NET Framework?

(For those unfamiliar with these Java methods) this is also known as:

  • Hamming Weight
  • Population Count (often called POPCNT when implemented in hardware.)

Although there are plenty of implementations to be found on the web, I was wondering if there was a standard library implementation.

I know this is not in BitArray, UInt32 or BitConverter, but maybe there’s a version hidden somewhere, e.g. in a crypto function.

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1 Answer

  1. Editorial Team

    Neither the BitVector32 nor the BitArray classes have such a method either so I believe that this method is indeed missing from the framework.

    Personally, I think these classes aren’t really useful anyway since they miss many natural bit operations. I’m not sure what they are really intended for. As it is, their usefulness very limited.

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