About Visual Basic Linq to SQL ON Windows Phone

Dear All, I have a question about using vb linq to sql on windows phone,

I want to handle local database, and I create a table 'Contacts', it has three columns.

the three columns is ID, Name, PhoneNumber.

If I want to update a record where Name is Ed,

In C# the syntax like this

            DBHandler mDBHandler = new DBHandler(DBHandler.DBConnection);
            var mContacts = from Contacts in mDBHandler.Contacts where Contacts.Name == "Ed" select Contacts;
            Contacts mSpecContact = new ObservableCollection<Contacts>(mContacts).Single();

            mSpecContact.PhoneNumber = "0912345678";

            mDBHandler.SubmitChanges();

And it works exactly,

but if I use visual basic, the syntax like this

        Dim mDBHandler As DBHandler = New DBHandler(DBHandler.DBConnection)
        Dim mContacts = From Contacts In mDBHandler.Contacts Where Contacts.Name = "Ed" Select Contacts
        Dim mSpecContact As Contacts = New ObservableCollection(Of Contacts)(mContacts).Single
        mSpecContact.PhoneNumber = "0912345678"

        mDBHandler.SubmitChanges()

An error occur,

,

is the syntax different in vb and C#?

the error message means that vb does not support string compare.

If I replace the select code like this

original
Dim mContacts = From Contacts In mDBHandler.Contacts Where Contacts.Name = "Ed" Select Contacts
replace
Dim mContacts = From Contacts In mDBHandler.Contacts Where Contacts.ID = 1 Select Contacts

it work exactly.

does anyone knows the correctsyntax in vb?

thanks a lot.