public static Boolean IsTimeunit(String time_unit)
{
Boolean istime_unit = new Boolean();
if (String.Equals(time_unit, "day", StringComparison.CurrentCultureIgnoreCase))
{
istime_unit = true;
}
else if (String.Equals(time_unit, "week", StringComparison.CurrentCultureIgnoreCase))
{
istime_unit = true;
}
else if (String.Equals(time_unit, "month", StringComparison.CurrentCultureIgnoreCase))
{
istime_unit = true;
}
else
{
istime_unit = false;
}
return istime_unit;
}