SmtpClientを利用してメールを送信する方法

SmtpClientを利用してメールを送信する方法
VB.NET

Dim senderMail As String = "send@mail.co.jp"
Dim recipientMail As String = "user@xxx.xxx"
Dim subject As String = "HEAD"
Dim body As String = "BODY" + vbCrLf + vbCrLf + "sea you"

Dim sc As New System.Net.Mail.SmtpClient()
sc.Host = "localhost"
sc.Port = 25
sc.Send(senderMail, recipientMail, subject, body)
sc.Dispose()

C#

string senderMail = "s@xxx.xxx";
string recipientMail = "u@xxx.xxx";
string subject = "tt";
string body = "tttt。\r\n\r\n BO。";

System.Net.Mail.SmtpClient sc = new System.Net.Mail.SmtpClient();
sc.Host = "localhost";
sc.Port = 25;
sc.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
sc.Send(senderMail, recipientMail, subject, body);
sc.Dispose();