Test Email Functionality Without Smtp Port Enabled In C#

string recipient = string.Empty;
string subject = string.Empty;
string message = string.Empty;

Console.WriteLine("From:gyansangrah@gyansangrah.com");
Console.WriteLine("Recipient:");
recipient = Console.ReadLine();
Console.WriteLine("Subject:");
subject = Console.ReadLine();
Console.WriteLine("Message:");
message = Console.ReadLine();

// Send email
MailMessage mailMessage = new MailMessage();
MailAddress fromAddress = new MailAddress("gyansangrah@gyansangrah.com");
mailMessage.From = fromAddress;
mailMessage.To.Add(recipient);
mailMessage.Subject = subject;
mailMessage.Body = message;
            

SmtpClient smtpClient = new SmtpClient();
smtpClient.Host = "localhost";
smtpClient.Send(mailMessage);

Console.WriteLine("Email Sent. Press any key to close the application......");
Console.ReadLine();

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
	<startup>
		<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1" />
	</startup>
	<system.net>
		<mailSettings>
			<smtp deliveryMethod="SpecifiedPickupDirectory">
				<specifiedPickupDirectory pickupDirectoryLocation="C:\MailFolder\"/>
			</smtp>
		</mailSettings>
	</system.net>
</configuration>

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