C# Program to display the number of days in a month

Use the DaysInMonth to display the number of days in a month.

Add the year and month as a parameter for the DaysInMonth() method −

DateTime.DaysInMonth(2018, 8);

The following is an example −

Example

 Live Demo

using System;
using System.Collections.Generic;
using System.Linq;
public class Demo {
   public static void Main() {
      Console.WriteLine("Today = {0}", DateTime.Today);
      int num_days = DateTime.DaysInMonth(2018, 8);
      Console.WriteLine("Days in August: "+num_days);
   }
}

Output

Today = 9/4/2018 12:00:00 AM
Days in August: 31