ASP.NET Add AutoNumber Column in GridView or DataList

Send Email using Gmail ASP.NET C# VB.NET

If you want to send email using your Gmail account or using Gmail's smtp server in ASP.NET application or if you don't have a working smtp server to send mails using your ASP.NET application or aspx page than sending e-mail using Gmail is best option.

First of all add below mentioned namespace in code behind of aspx page from which you want to send the mail.

using System.Net.Mail;
Now write this code in click event of button
C# code
protected void Button1_Click(object sender, EventArgs e)
{
MailMessage mail = new MailMessage();
mail.To.Add("jainamit.agra@gmail.com");
mail.To.Add("amit_jain_online@yahoo.com");
mail.From = new MailAddress("jainamit.agra@gmail.com");
mail.Subject = "Email using Gmail";
string Body = "Hi, this mail is to test sending mail"+
"using Gmail in ASP.NET";
mail.Body = Body;
mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Credentials = new System.Net.NetworkCredential
("YourUserName@gmail.com","YourGmailPassword");
smtp.EnableSsl = true;
smtp.Send(mail);
}
VB.NET code 
Imports System.Net.Mail
Protected Sub Button1_Click
(ByVal sender As Object, ByVal e As EventArgs)
Dim mail As MailMessage = New MailMessage()
mail.To.Add("jainamit.agra@gmail.com")
mail.To.Add("amit_jain_online@yahoo.com")
mail.From = New MailAddress("jainamit.agra@gmail.com")
mail.Subject = "Email using Gmail"
String Body = "Hi, this mail is to test sending mail"+
"using Gmail in ASP.NET"
mail.Body = Body
mail.IsBodyHtml = True
Dim smtp As SmtpClient = New SmtpClient()
smtp.Host = "smtp.gmail.com"
smtp.Credentials = New System.Net.NetworkCredential
("YourUserName@gmail.com","YourGmailPassword")
smtp.EnableSsl = True
smtp.Send(mail)
End Sub

Change YourUserName@gmail.com to your gmail ID and YourGmailPassword to Your password for Gmail account and test the code.

Than you need to check your Gmail username and password.

Hope this helps

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