How to Calculate difference between two dates in C#

Do you need to find the difference in number of days, hours or even minute between the two date range?

Here's how:

Assuming the a and b variable is of type DateTime object.

DateTime a = DateTime.Now;
DateTime b = DateTime.Now
(b - a).TotalDays

datetimepicker-difference-between-dates

Example:

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.dateTimePicker1.CustomFormat = "MM/dd/yyyy HH:mm";
            this.dateTimePicker1.Format = System.Windows.Forms.DateTimePickerFormat.Custom;
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            //Calculate the total number of days
            textBox1.Text = (dateTimePicker2.Value - dateTimePicker1.Value).TotalDays.ToString("#");
 
            //Calculate the total number of hours
            textBox2.Text = (dateTimePicker2.Value - dateTimePicker1.Value).TotalHours.ToString("#");
 
            //Other options are total of minutes, seconds and milliseconds.
        }
    }
}
 