TimeSpanExt is a .NET library which makes timespans useful and easy.  The functionality of TimeSpanExt greatly exceeds that of the TimeSpan class that ships with .NET.

* Setup

1) Get the source:

    git clone git://github.com/WizardOfOgz/TimeSpanExtensions.git
  
2) Build the TimeSpanExtensions project

3) Include the library in your project.

* Why use TimeSpanExt?
    - The code looks nice:  DateTime searchStartDate = 1.Month().Ago;
    - Supports complex expressions:  DateTime searchEndDate = searchStartDate + (1.Month() - 1.Day());
    - Time spans can be stored and applied to more than one DateTime yielding the correct results:

        class ScheduleEvent
        {
            public string Name { get; set; }
            public DateTime StartAt { get; set; }
            public TimeSpanExt Duration { get; set; }
            public DateTime EndsAt { 
                get{ return StartTime + Duration; } 
            }
        }
        
        var vacationDuration = 1.Month();
        var myVacation = new ScheduledEvent{ Name="One-month vacation", StartTime=DateTime.Parse("1/31/2011"), Duration=vacationDuration);

        DateTime backToWork = myVacation.EndsAt;            // Feb 28, 2011 - Wait that's only 28 days from the start of my vacation!

        myVacation.StartTime = DateTime.Parse("3/30/2011"); // Change the start date.  Duration is still one month.
        DateTime backToWork = myVacation.EndsAt;            // Apr 30, 2011 - Much better, taking off 31 days.
  

* Complex TimeSpanExts

TimeSpanExt also supports addition and subtraction.  The order of the operands is preserved as is shown in this example:

    var monthPlusDay = 1.Month() + 1.Day();
    var dayPlusMonth = 1.Day() + 1.Month();

    DateTime dt = DateTime.Parse("2/28/2010");

    DateTime result;
    result = dt + monthPlusDay;  // returns 3/29/2010
    result = dt + dayPlusMonth;  // returns 4/1/2010