Hi @Shafer, Brian A. (NSGAL) ,
Please check your steps follow MS document CLR Scalar-Valued Functions to check if you missing some steps when you create Scalar Function in SQL server. Please make sure the SQL server query running under the correct database.
I am not familiar with VB.net environment, so I can only do a simple test for you.
If I misunderstood your issue, please let me know.
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