Adding Days to a Date but Excluding Weekends

Question

Given a date how can I add a number of days to it, but exclude weekends. For example, given 11/12/2008 (Wednesday) and adding five will result in 11/19/2008 (Wednesday) rather than 11/17/2008 (Monday).

I can think of a simple solution like looping through each day to add and checking to see if it is a weekend, but I'd like to see if there is something more elegant. I'd also be interested in any F# solution.

Answer 1

using Fluent DateTime https://github.com/FluentDateTime/FluentDateTime

var dateTime = DateTime.Now.AddBusinessDays(4); 

Answer 2

public DateTime AddBusinessDays(DateTime dt, int nDays) {     int weeks = nDays / 5;     nDays %= 5;     while(dt.DayOfWeek == DayOfWeek.Saturday || dt.DayOfWeek == DayOfWeek.Sunday)         dt = dt.AddDays(1);      while (nDays-- > 0)     {         dt = dt.AddDays(1);         if (dt.DayOfWeek == DayOfWeek.Saturday)             dt = dt.AddDays(2);     }     return dt.AddDays(weeks*7); }