//the "Energy" column for the "TOU" file type
public static DataTable TOUMedianDataTable()
{
DataTable dt = CSVFileHelper.CreateDataTable();
DirectoryInfo dir = new DirectoryInfo(csvPath);
var files = dir.GetFiles("TOU_*.csv");
foreach (var item in files)
{
CSVFileHelper.ReadCSVFile(item.FullName, "Date/Time", "Energy", ref dt);
}
return(dt);
}