something similar to this. just a guess.
using System.Data.OleDb;
string strConn;
strConn = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=D:\\Somehwere\\Somehwere\\App_Data\\FILE.xls; Extended Properties=Excel 8.0;";
OleDbDataAdapter myCommand = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", strConn);
DataSet myDataSet = new DataSet();
myCommand.Fill(myDataSet, "ExcelInfo");
foreach (DataRow theRow in myDataSet.Tables["ExcelInfo"].Rows)
{
Console.WriteLine(theRow[0].ToString());
}