How to Send Mail in asp.net C#

How to Send Mail in asp.net C# ?
How to Send Mail To Multiple Address in C#?
How to Send Mail Attachment in C#?

Here I am going to Show How to Send Mail in Asp.net C#

Step-1:

First Add the following Namespace to your Code

using System.Net.Mail;
using System.Text;

using System.Net.Mime;

Step -2:

Write the following Code in Your Code File

private void CreateMail()
{
MailMessage email = BuildMail();
SendEMail(email);
}

private MailMessage BuildMail()
   {
       string from, to, bcc, cc, subject, body;
       from = "yourgmailid";//Email Address of Sender
       to = "funkybik@gmail.com,guycrispy@gmail.com,bikram.sahoo@gmail.com";

//Email Address of Receiver
       bcc = "";
       cc = "";
       subject = "This is to Test wether mail configuration is working or not.";

//Provides the physical location to the curreent folder

string filePath = Server.MapPath("~") + "\\";

string fileName = filePath + "Logo.JPG";//Contains the path to image

       StringBuilder sb = new StringBuilder();
       sb.Append("Hi User,<br/>");
       sb.Append("This is a test email. How you doing? :p .<br/>");
       sb.Append("<br/>");
       sb.Append("Thanking you<br/>");
       sb.Append("dotnetdoctorbikram.blogspot.com");

       body = sb.ToString();

       AlternateView avw = AlternateView.CreateAlternateViewFromString(body, null, MediaTypeNames.Text.Html);
       LinkedResource linkedRes = new LinkedResource(fileName);
       linkedRes.ContentId = "image1";
       linkedRes.ContentType.Name = fileName;
       avw.LinkedResources.Add(linkedRes);


       MailMessage mail = new MailMessage();
       mail.From = new MailAddress(from);
       if (to.Contains(","))
       {
           string[] recepient = to.Split(',');
           for (int i = 0; i < recepient.Length; i++)
           {
               mail.To.Add(new MailAddress(recepient[i]));
           }
       }
       else
       {
           mail.To.Add(new MailAddress(to));
       }

       if (!string.IsNullOrEmpty(bcc))
       {
           mail.Bcc.Add(new MailAddress(bcc));
       }
       if (!string.IsNullOrEmpty(cc))
       {
           mail.CC.Add(new MailAddress(cc));
       }

       mail.Subject = subject;
       mail.Body = body;
       mail.AlternateViews.Add(avw);
       mail.IsBodyHtml = true;

       return mail;
   }

   private void SendEMail(MailMessage mail)
   {
       SmtpClient client= new SmtpClient();
       client.Host = "smtp.gmail.com";
       client.Port = 587;
       client.EnableSsl = true;
       client.Credentials = new System.Net.NetworkCredential("yourgmailpassword","yourgmailid");
       try
       {
           client.Send(mail);
       }
       catch (Exception ex)
       {
           throw ex;
       }

   }