Asp.net date functions the date of the first and last days of a month

# Region returns the date of the first and last days of a month.
/// <Summary>
/// Obtain the first day of the month
/// </Summary>
/// <Returns> datetime </returns>
Public static datetime getfirstdayofmonth ()
{
Return getfirstdayofmonth (datetime. Now );
}
/// <Summary>
/// Obtain the date of the last day of the month.
/// </Summary>
/// <Returns> datetime </returns>
Public static datetime getlastdayofmonth ()
{
Return getlastdayofmonth (datetime. Now );
}
/// <Summary>
/// Get the first day of the month
/// </Summary>
/// <Param name = "someday"> Any day of the month </param>
/// <Returns> datetime </returns>
Public static datetime getfirstdayofmonth (datetime someday)
{
Int totaldays = datetime. daysinmonth (someday. Year, someday. month );
Datetime result;
Int Ts = 1-Someday. Day;
Result = someday. adddays (TS );
Return result;
}
/// <Summary>
/// Get the last day of the month
/// </Summary>
/// <Param name = "someday"> Any day of the month </param>
/// <Returns> datetime </returns>
Public static datetime getlastdayofmonth (datetime someday)
{
Int totaldays = datetime. daysinmonth (someday. Year, someday. month );
Datetime result;
Int Ts = totaldays-Someday. Day;
Result = someday. adddays (TS );
Return result;
}
# Endregion