>>>
>>>Top of my head I don't think Guid is a nullable type so the second part is probably uneccessary anyway. Maybe:
>>>

>>>if (dr["Track_Id"] is Guid && (Guid)dr["Track_Id"] != Guid.Emptyl)

>>>but that may be overkill ?
>>
>>Hmm, well I was thinking since the DataRow was derived from a serialized read it could get left null. Paul posted a suggestion for that.
>
>I like mine better than Paul's (g) - it quarantees the second expression won't fail (i.e. the cast to Guid will work) ; Paul's checks that it's not null but NOT that it is indeed a Guid....
>

It does in deed. I am realizing how much I don't know about this un-typed data stuff. I suppose the possibilities become many as to what could be in that column if you don't have control over the data. In this case I am not pulling it from an actual table but rather from an xml file so it could be almost anything. I wish I could get this done another way now that I see the issues. I tried to use the MM Entity objects that are type safe, but had some problems in making it framework aware. More research...
Tim