[Solved] How to send mail (email) to multiple users in ASP.Net

Refer:

1. Send email to multiple users in ListBox on Button click in ASP.Net
2. How to send email to multiple recepients in ASP.Net
3. Send same email to multiple users in ASP.Net

Try This:

public static void SendEmailUsingASPnet()
{
    //Email address and content
    string stringFromEmailAddress = "abcd@xyz.com";
    //Display name in the from email
    string stringFromEmailDisplayName = "ABCD Email";

    //To Address
    string stringEmailToAddress1 = "a@b.com";
    string stringEmailToAddress2 = "b@c.com";

    //Email Subject
    string stringEmailSubject = "Send Email Using ASP.net";

    //Email Content
    string stringEmailContent = "This is a test email content for the demo";

    //SMTP Server - Your SMTP IP or Server Name
    string stringSMTPServer = "127.0.0.1";


    //Declare teh mail message object using name space System.Net.Mail
    MailMessage mailmessage = new MailMessage();

    //Add From email address & display name
    mailmessage.From = new MailAddress(stringFromEmailAddress, stringFromEmailDisplayName);

    //Add Email To Address
    mailmessage.To.Add(stringEmailToAddress1);
    mailmessage.To.Add(stringEmailToAddress2);

    //Add Email subject
    mailmessage.Subject = stringEmailSubject;

    //Add email content
    mailmessage.Body = stringEmailContent;

    SmtpClient smtpclient = new SmtpClient(stringSMTPServer, 25);

    //Sending email
    smtpclient.Send(mailmessage);
}