LINQ to SQL Invalid Cast Issue

I'm getting an invalid 开发者_高级运维cast exception but I'm not sure why, here is the list of my conversions:

SQL -> VB.NET
char(4) -> String
varchar(50) -> String
tinyint -> Integer
char(1) -> Char
bit -> boolean
smallint -> Integer
smallmoney -> Double
int -> Integer
datetime -> datetime

It's possible that smallmoney should go to Decimal instead... but why not just use a binary chop to try the first half, then the second etc to narrow down what's causing the problem?

If you could post the query involved, that would help too.

smallmoney maps to Decimal, see msdn (numeric mapping)