Which version of .Net is running Custom Code?

[remyblok]

Hello,

I'm adding custom code to my Connector. But sometimes my code is does not compile due because the types do not work. So I want to know which .Net version is used to compile the script. If I look at the runtime it seems to be .Net 6. But I get an compile error on StringSplitOptions.TrimEntries. So the compiler must be .Net Core 3 or lower. Does anyone know which .Net version is actually used, so I can use the same .Net version while developing the script locally?

Failed to provision compute for custom code. Request failed with error 'Code: BadRequest. Message: script.csx(306,90): error CS0117: 'StringSplitOptions' does not contain a definition for 'TrimEntries'.'. The correlation Id is '250fa26c-d113-4171-8aab-6606ec836ad2'.

Thanks for your help!

[remyblok]

So I looked further into this. it really is just like executing csi.exe from the command line. From what I gather this is running/compiling .Net 4.8, but with C# 10 language features. When running csi.exe with my custom script I get the exact same results as I get from Code in a Custom Connector.