Subtract days from a DateTime

Question

I have the following code in my C# program.

DateTime dateForButton =  DateTime.Now;  
dateForButton = dateForButton.AddDays(-1);  // ERROR: un-representable Date         


        

Answer 1

Using AddDays(-1) worked for me until I tried to cross months. When I tried to subtract 2 days from 2017-01-01 the result was 2016-00-30. It could not handle the month change correctly (though the year seemed to be fine).

I used date = Convert.ToDateTime(date).Subtract(TimeSpan.FromDays(2)).ToString("yyyy-mm-dd"); and have no issues.