Split function in vb.net

Dim filename As String = "C:\Users\Rachayita\Desktop\test_rach.txt"

            Dim query As String

            Dim data As String = System.IO.File.ReadAllText(filename)

            Dim latitude, longitude, address1, address2 As String

            Dim test As String() = data.Split(",")

            latitude = test(0).ToString()

            longitude = test(1).ToString()

            address1 = test(2).ToString()

            address2 = test(3).ToString()

            query = "insert into test_rach values ('" + latitude + "','" + longitude + "','" + address1 + "','" + address2 + "')"

            Dim dtConnection As New OdbcConnection(ConfigurationManager.ConnectionStrings("DBConnection").ToString)

            dtConnection.Open()

            Dim cmd As New OdbcCommand(query, dtConnection)

            cmd.ExecuteNonQuery()

            cmd.Parameters.Clear()

            dtConnection.Close()

and text file data is - 

latitude1, longitude1, address11, address21
latitude2, longitude2, address12, address22
latitude3, longitude3, address13, address23