Announcing .NET 11 Release Candidate 1

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  Rolf Kristensen 2 weeks ago · Edited 0

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  Think early adopters will be surprised, if their applications are using both decimal and double values:
  - https://learn.microsoft.com/en-us/dotnet/core/compatibility/core-libraries/11/decimal-biginteger-floating-point-conversions

  Previous versions of .NET implicitly generally rounded away the floating-point noise when converting from double to decimal. But NET11 no longer hides the noise, and so double value 1.23 becomes decimal value 1.229999999999999982236431606. Thus loading double values like price and amount, and casting them to decimal before multiplication will give you new different results, that potentially affect Line-Of-Business (LOB) applications.

  Before updating to NET11 then check your entire code-base where decimal constants are initialized from double-value (instead of decimal literals). It might also be...

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  Think early adopters will be surprised, if their applications are using both decimal and double values:
  – https://learn.microsoft.com/en-us/dotnet/core/compatibility/core-libraries/11/decimal-biginteger-floating-point-conversions

  Previous versions of .NET implicitly generally rounded away the floating-point noise when converting from double to decimal. But NET11 no longer hides the noise, and so double value 1.23 becomes decimal value 1.229999999999999982236431606. Thus loading double values like price and amount, and casting them to decimal before multiplication will give you new different results, that potentially affect Line-Of-Business (LOB) applications.

  Before updating to NET11 then check your entire code-base where decimal constants are initialized from double-value (instead of decimal literals). It might also be be a good idea to verify database-schemas and replace float-types with native decimal/numeric (SqlClient will not apply the intended decimal rounding). And also check all other external interfaces you might have like c++ / protobuf / Json / etc. where you cast from double to decimal.

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