KafkaFlow.Abstractions references the delisted version 4.6.1 of System.Threading.Tasks.Extensions:
|
<PackageReference Include="System.Threading.Tasks.Extensions" Version="4.6.1" /> |
System.Threading.Tasks.Extensions should be frozen at assembly version 4.2.1.0 for all package versions:
However, System.Threading.Tasks.Extensions 4.6.1 incorrectly bumped the assembly version to 4.2.2.0 (and was delisted as a result):

This was resolved by: dotnet/maintenance-packages#212
The latest version of System.Threading.Tasks.Extensions 4.6.3 uses assembly version 4.2.1.0:

However KafkaFlow.Abstractions still references the delisted package, which means if used in .NET Framework with any other recent version of the package, the above error is thrown as it appears like it is being downgraded:
Error CS1705: Assembly 'KafkaFlow' with identity 'KafkaFlow, Version=4.2.0.0, Culture=neutral, PublicKeyToken=null' uses 'System.Threading.Tasks.Extensions, Version=4.2.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' which has a higher version than referenced assembly 'System.Threading.Tasks.Extensions' with identity 'System.Threading.Tasks.Extensions, Version=4.2.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'
The fix would be to update the package reference in KafkaFlow.Abstractions.
KafkaFlow.Abstractions references the delisted version 4.6.1 of
System.Threading.Tasks.Extensions:kafkaflow/src/KafkaFlow.Abstractions/KafkaFlow.Abstractions.csproj
Line 12 in 2596598
System.Threading.Tasks.Extensionsshould be frozen at assembly version 4.2.1.0 for all package versions:However,

System.Threading.Tasks.Extensions4.6.1 incorrectly bumped the assembly version to 4.2.2.0 (and was delisted as a result):This was resolved by: dotnet/maintenance-packages#212

The latest version of
System.Threading.Tasks.Extensions4.6.3 uses assembly version 4.2.1.0:However
KafkaFlow.Abstractionsstill references the delisted package, which means if used in .NET Framework with any other recent version of the package, the above error is thrown as it appears like it is being downgraded:The fix would be to update the package reference in KafkaFlow.Abstractions.