>OK, I guess I misunderstood what you said before. Thanks for clarifying. However, your original code is not checking for the string to be null. You had this:
>
>

>        Public Function GetNonNullable(ByVal tcValue As String) As String
>            Dim lcValue As Integer = ""
>
>            ' If we have a value
>            If Not tcValue Is DBNull.Value Then
>                lcValue = tcValue
>            End If
>
>            Return lcValue
>        End Function
>

>
>Checking for DBNull.Value is NOT the same thing as checking for null! In fact, in C# the above comparison cannot even be made. I think what you actually want to compare is whether it's equal to null (assuming I've gotten the VB syntax correct):
>
>

>        Public Function GetNonNullable(ByVal tcValue As String) As String
>            Dim lcValue As Integer = ""
>
>            ' If we have a value
>            If Not tcValue = null Then
>                lcValue = tcValue
>            End If
>
>            Return lcValue
>        End Function
>

Is this the syntax you are referring to:

        ' Avoid to receive a null
        ' expC1 Value
        Public Function GetNonNullable(ByVal tcValue As String) As String
            Dim lcValue As String = ""

            ' If we have a value
            If Not IsDBNull(tcValue) Then
                lcValue = tcValue
            End If

            Return lcValue
        End Function