I have a BO with a lot of fields that need to set with defaults, I also have a datatable with the field name and value. Is there a way to set these defaults looping thru the data table without having to use a select case where i must type Case datatable.fieldname = me.fieldname. For example in vfp one could use macro

substitution , but not in vb.net or c sharp.net

Yeah...as you already know, macros were a very dangerous thing since it was not strong-typed, but also a useful tool when you just want to "strong-arm" something.  In .NET, you will use reflection.  However, in this example you can just use the CurrentRow exposed on the BO.