Datetime in C# add days
addition, c#, c#-4.0, date, datetime
Solution
DateTime is immutable. That means you cannot change it's state and have to assign the result of an operation to a variable.
endDate = endDate.AddDays(addedDays);
Problem
I want to add days in some date. I have a code like this: ``` DateTime endDate = Convert.ToDateTime(this.txtStartDate.Text); Int64 addedDays = Convert.ToInt64(txtDaysSupp.Text); endDate.AddDays(addedDays); DateTime end = endDate; this.txtEndDate.Text = end.ToShortDateString(); ``` But this code is not working, days are not added! What the stupid mistake I'm doing?