[02/03] Collection was modified; enumeration operation may not execute.

[Asgorath]

Hi
I got 2 datagrid and single column. Datagrid 1 contains 2 rows number 2 and 3. Datagrid2 contains 1, 2 and 3. I want to remove the duplicate numbers on datagrid2. The tables are unrelated so i would have to use cursors.

Try
            Dim a As String
            For i As Integer = 0 To ds1.Tables(0).Rows.Count - 1
                a = Me.DataGrid1.Item(i, 0).ToString.TrimEnd
                For Each row As DataRow In ds2.Tables(0).Rows
                    ''Console.WriteLine(row.Item(0).ToString)
 
                    If row.Item(0).ToString = a Then
 
                        ds2.Tables(0).Rows.Remove(row)
                    End If
                Next
            Next
        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try
        Me.DataGrid2.DataSource = ds2.Tables(0)

I get the exception Collection was modified; enumeration operation may not execute. Any suggestions , thanks.
Jorge