delete excel worksheets programmatically

xlApp.DisplayAlerts = false;
for (int i = xlApp.ActiveWorkbook.Worksheets.Count; i > 0 ; i--)
{
    Worksheet wkSheet = (Worksheet)xlApp.ActiveWorkbook.Worksheets[i];
    if (wkSheet.Name == "NameOfSheetToDelete")
    {
        wkSheet.Delete();
    }
}
xlApp.DisplayAlerts = true;

I know this is old but I just use the fallowing

workBook.Sheets["Sheet1"].Delete();