using System;

​

public class Program

{

    public class Customer

    {

        private string name; // field / backing field

        // C# property

        public string Name

        {

            get

            {

                return name;

            }

​

            set

            {

                // Check if the name is empty or null

                if (string.IsNullOrEmpty(value))

                {

                    // Throw an exception with a message

                    throw new ArgumentNullException("Name cannot be empty or null");

                }

​

                name = value;

            }

        }

​

        // C# Auto property, doesn't require, backing field

        public string DateOfBirth { get; set; }

    }

​

    public static void Main()

    {

        // Can access Name through the name property

        Customer customer = new Customer();

        customer.Name = "Azad";

        Console.WriteLine(customer.Name);

        customer.Name = string.Empty; // it will throw exception with stacktrace, example in the output

    }

}