Compilation error System.Runtime.CompilerServices.NullableContextAttribute' not found in assembly

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Posted on by Sridhar Narayanan

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Hi Experts,

I am getting a below compilation error.

Severity Code Description Project File Line Suppression State
Error Type 'System.Runtime.CompilerServices.NullableContextAttribute' not found in assembly
'System.Runtime, Version=4.1.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
Please run a full compilation of the model corresponding to the assembly 'System.Runtime, Version=4.1.2.0,
Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

I have a DLL from C# Library project and referenced the DLL in for my X++ customization. While compiling I getting the above error.

Target framework of C# Library project is .NET 8.0 (I also tried generating DLL with .NET 6.0)

Any guidance please.

Regards,

Sridhar

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Martin Dráb 230,188 Most Valuable Professional on at

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Compilation error System.Runtime.CompilerServices.NullableContextAttribute' not found in assembly

I'm assuming this is about F&O, not AX. Please confirm that and I'll move this thread to the Finance forum.

Your target framework is indeed wrong. You must build the assemble for .NET Framework, not .NET Core, namely .NET Framework 4.7.2.