Connect two different Excel file 2007 and 2010 with one connection string c#

/* on top */
using System.Data.OleDb;


....

string filePath = @"C:\MyExcel.xlsx";
string connectionstring = "provider=Microsoft.ACE.OLEDB.12.0;data source={0};extended properties='Excel 12.0;HDR=YES;'";
connectionstring = connectionstring.Replace("{0}", filePath ); 

OleDbConnection oConn = new OleDbConnection(connectionstring);
oConn.Open();
...
oConn.Close();