如何在vb.net中使用数组进行组合框使用

Question

我说我想使用此方法返回一些数组

Function getKategori() As String()
        Dim a As String() = {}
        Try
            connection.Open()
            Dim myCommand As New MySqlCommand
            myCommand.Connection = connection
            myCommand.CommandText = "SELECT * FROM kategori"
            myAdapter.SelectCommand = myCommand
            reader = myCommand.ExecuteReader
            While reader.Read()
                a = {reader(0).ToString, reader(1).ToString}
            End While
        Catch ex As Exception

        End Try
        Return a
    End Function

应该像这样返回 {{a,b},{a,b}}等，我想通过使用foreach方法将该结果用于组合框

For Each k In x.getKategori()
            '?some function to add these items into combobox?
        Next

我应该怎么做？