CSV, Excel File Reading

[] oldCSV = System.IO.File.ReadAllLines("LOCATION");
[] newCSV = System.IO.File.ReadAllLines("LOCATION");

if ((newCSV.Length - 1) > (oldCSV.Length)) {
    //their are differences so get the new differences
    for (diff = Convert.ToInt32(((newCSV.Length - 1) > (oldCSV.Length))); diff <= newCSV.Length; diff++) {
        //do what you want with the changes
    }
} else {
    //no changes
}

[] oldCSV = System.IO.File.ReadAllLines("LOCATION");
    [] newCSV = System.IO.File.ReadAllLines("LOCATION");

    foreach (object oldRecord_loopVariable in oldCSV) {
        oldRecord = oldRecord_loopVariable;
        foreach (object newRecord_loopVariable in newCSV) {
            newRecord = newRecord_loopVariable;
            if (oldRecord == newRecord) {
            //no record changed
            } else {
                //something is not the same
            }
        }
    }