>>Why doesn't this work????
>>
>>

>>using (AppSecurityDataContext dc = GetDataContext())
>>{
>>    tblUsersInApplication uia = new tblUsersInApplication
>>    {
>>        UserId = um.UserId,
>>        ApplicationId = LoginCredentials.ApplicationId,
>>        LastLoginDateTime = DateTime.Now
>>    };
>>
>>    try
>>    {
>>        dc.SubmitChanges();
>>    }
>>    catch (Exception e)
>>    {
>>        Error = e;
>>    }
>>}   
>>

>>
>>I get no exceptions. Runs fine. The date/time doesn't show up in the SQL table after it runs.
>
>Is this Entity Framework? (I'm guessing it is.)
>
>You need to add the new item to the context, if it's not a child entity EF will have created a function something like this:
>
>dc.AddTotblUsersInApplication(uia);
>
>If it's a child you just add it to the reference collection on the parent entity.

No, it's just a plain old Linq statement. Not EF.

And, I have a bunch of other queries just like this one that work fine.