Randomness in .NET

I think this is the github issue referred to:<p><a href="https:&#x2F;&#x2F;github.com&#x2F;dotnet&#x2F;corefx&#x2F;issues&#x2F;23298" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;dotnet&#x2F;corefx&#x2F;issues&#x2F;23298</a><p>I wrote some replacement classes that address all of the known issues, here:<p><a href="https:&#x2F;&#x2F;github.com&#x2F;colgreen&#x2F;Redzen&#x2F;tree&#x2F;master&#x2F;Redzen&#x2F;Random" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;colgreen&#x2F;Redzen&#x2F;tree&#x2F;master&#x2F;Redzen&#x2F;Random</a><p><a href="https:&#x2F;&#x2F;www.nuget.org&#x2F;packages&#x2F;Redzen&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.nuget.org&#x2F;packages&#x2F;Redzen&#x2F;</a>

Two vital information on .Net PRNG :<p>- It is not thread-safe (and might start outputting a serie of 0 when called in parallel)<p>- There is a bug (acknowledged by Microsoft but not fixed for backward compatibility reasons) in the implementation meaning that the generator has an abnormally short period and is, overall, less random looking.

A useful snippet from the article:<p>&quot;RNGCryptoServiceProvider is generally a safer choice when you need to generate random bytes. Creating an instance of this class is expensive, so it’s better to populate a 400-byte array than call the constructor 100 times to populate a 4-byte array.&quot;

The blog-post by fuglede with a detailed analysis of the implications of the RNG-bug is well worth a read: <a href="https:&#x2F;&#x2F;fuglede.dk&#x2F;en&#x2F;blog&#x2F;bias-in-net-rng&#x2F;" rel="nofollow">https:&#x2F;&#x2F;fuglede.dk&#x2F;en&#x2F;blog&#x2F;bias-in-net-rng&#x2F;</a>

I might be missing something, but the three predicated values are not in the &quot;nextSeed&quot; table? Whereas the original three are.<p>EDIT: I feel like I miss something in the explanation. Can anyone explain how the seed table is actually used?

<i>The algorithm used in the .NET Core is the same as in the .NET Framework</i> [...] <i>There is a difference, however, when we use the default constructor.</i><p>“Core” and “Framework” have different implementations of the same class? Who names these things?

Thank you for sharing - I will have to put some work into integrating this with my software that is unfortunately based on a tripleton design pattern, but it&#x27;s worth the effort.