BindingSource.Find causing problems

Hi all

I have an ADO problem when I call BindingSource.Find and the
BindingSource.DataSource is set to a DataView. Here is some sample code
to illustrate my problem

DataSet dataSet = new DataSet();
DataTable dataTable = dataSet.Tables.Add();
DataColumn dataColumn = dataTable.Columns.Add();
dataColumn.ColumnName = "PrimaryKey";
dataColumn.AutoIncrement = true;
dataTable.PrimaryKey = new DataColumn[] { dataColumn };

BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = new DataView(dataTable);


for (int i = 0; i < 10; i++)
{
dataSet.Clear();
dataTable.Rows.Add();
bindingSource.Find("PrimaryKey", 33);
}

This sample code produces the folowing exception

Unhandled Exception: System.NullReferenceException: Object reference
not set to an instance of an object.
at System.Data.DataColumn.IsNotAllowDBNullViolated()
at System.Data.DataSet.EnableConstraints()
at System.Data.DataSet.set_EnforceConstraints(Boolean value)
at System.Data.DataSet.Clear()

However, if we comment out the line

bindingSource.Find("PrimaryKey", 33);

The exception is not thrown.

Similarly, no exception is thrown if we change the line

bindingSource.DataSource = new DataView(dataTable);

to

bindingSource.DataSource = new dataTable;



Does anyone have any ideas as to why this is happening?

Thanks
Neil.