Hi @Drusti Kumar ,
Thanks for reaching out.
Starting with .NET Core and later (.NET 5–.NET 8), you’ll need to use a SmartAssembly version that explicitly supports .NET Core and .NET 5+. The version 6.9.0.114 you mentioned only supports up to .NET Framework 4.x, so it won’t properly work with .NET 8 assemblies.
Please download the latest SmartAssembly version (v9.x or later) from the Red Gate website, as newer builds include full compatibility with .NET 8 and related SDKs.
You can refer to Red Gate’s official compatibility list here: https://documentation.red-gate.com/sa/release-notes-and-other-versions
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Hope this helps! If my answer was helpful - kindly follow the instructions here so others with the same problem can benefit as well.