>I have a class which starts like this:
>
>

>Imports System.Data.OleDb
>
>Public Class Data
>
>    Public oDataAdapter As OleDbDataAdapter
>    Public oDataSet As DataSet
>    Public oDataView As DataView
>    Public cSQL As String
>    Public cConnectionString As String
>    Public nCount As Integer
>    Public oParameters As OleDbParameterCollection
>

>
>To instantiate it, I do something like this:
>
>

>        Dim loDataProvider As Framework.Data = New Framework.Data
>

>
>Now, I need to add some parameters in the collection before doing something else. So, the instantiation code section now contains this:
>
>

>        Dim loDataProvider As Framework.Data = New Framework.Data
>        loDataProvider.oParameters.Add(New OleDbParameter("@Username", lcUsername))
>

>
>This doesn't give any error at design time. But, when I run it, I obtain:
>
>Object reference not set to an instance of an object
>
>Anyone would know what I have to adjust?

In the class definition, change Public oParameters As OleDbParameterCollection to Public oParameters As New OleDbParameterCollection.

Or change oParameters to a property and intialize it in the Get method.