This project help silent the duplicated changing callbacks for IOptionsMonitor. See dotnet/aspnetcore#2542 for more details.
Moved to https://github.com/hcoona/OneDotNet/tree/ac1921c/MicrosoftExtensions/Options/DedupChangeExtensions
Calculate the object hash & compare the hash value when changing callbacks happened.
The hash value is calculated by BinaryFormatter then SHA1.