ADO.NET :: Export From Datatable To Dbf File

I want export datatable to dbf . the following is my code. the conection dont open

SqlConnection cn = new
SqlConnection("Data
Source=(local);Initial Catalog=test;Integrated Security=True");
SqlDataAdapte da =
new
SqlDataAdapter("select
* from test", cn);
DataSet ds = new
DataSet();
da.Fill(ds, "test");
string directory =
"E://";
OleDbConnection connection =
new
OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data
Source=E:\TEST.DBF;");
connection.Open();
OleDbCommand command = connection.CreateCommand();
if (System.IO.File.Exists(directory
+ @"TEST.DBF"))
command.CommandText =
"DELETE FROM Test
else
command.CommandText =
"CREATE TABLE Test (ID int, name varchar(50),last_name varchar(50))";
command.ExecuteNonQuery();
command.CommandText =
"SELECT * FROM Test";
OleDbDataAdapter adapter =
new
OleDbDataAdapter(command);
OleDbCommand insertCommand = connection.CreateCommand();
insertCommand.CommandText = "INSERT INTO Test (ID, name,last_name) VALUES (pID,pname,plast_name)";
}
foreach (DataRow
dr in ds.Tables["test"].Rows)
{
int id =
int.Parse(dr["ID"].ToString());
string name = dr["name"].ToString();
string last_name = dr["last_name"].ToString();
insertCommand.Parameters.Add("pID",
OleDbType.Integer, 4, ID);
insertCommand.Parameters.Add("pname",
OleDbType.VarChar, 50, name);
insertCommand.Parameters.Add("plast_name",
OleDbType.VarChar, 50, last_name);
insertCommand.UpdatedRowSource =
UpdateRowSource.None;