How to give strongly name to subsonic.core.dll

3.0 can do this for you but you'd need to make a template for it since we don't handle functions (yet) out of the box. I'll be working on this in the coming weeks - for now I don't think 2.2 will do this for you.

What version are you using? In 2.2 You can use the TableColumn object to get around this (it may be the same for 2.1 as well. So instead of using the struct, as you're doing, you can use the object (Table2.SidColumn).

If push comes to shove - you can override everything with a string - so in your case you could use "Table1.Sid" and "Table2.Sid" right in the Where() method.