How to Send Free SMS Using C#.NET? [With Source Code]

1. I am assuming that you have Visual Studio, Open your Visual Studio and click on File>new project, From the left side of your window, select Visual C#>Window and from the middle side select Windows Forms Application and then give the name of your project and then click ok which is shown in below.

2. From the ToolBox Drag and Drop four label, four Textbox and one button in your form and change the properties of these controls by selecting each control and right click that particular control and click on properties.

Four Label for phone no, gmail, password, message
Four Textbox for phone no, gmail, password, message
one Button to send

NOTE: You can increase the message box large for this select message box textbox go to properties and then change the multiline to true and ScrollBars to Both and the expand this textbox by dragging it.

3. Double click on the Send button and scroll up and then add namespace to your program as:

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

4. Now inside the clicking event of the button write the following piece of code:

string to, from, mess, pass;
MailMessage message = new MailMessage();
to = (txtPhone.Text).ToString();
from = (txtGmail.Text).ToString();
mess = (txtMessage.Text).ToString();
pass = (txtPass.Text).ToString();
message.To.Add(to);
message.From = new MailAddress(from);
message.Body = mess;
SmtpClient smtp = new SmtpClient("smtp.gmail.com");
smtp.EnableSsl = true;
smtp.Port = 587;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Credentials = new NetworkCredential(from, pass);
try
{
smtp.Send(message);
MessageBox.Show("send successfully", "message", MessageBoxButtons.OK, MessageBoxIcon.Information);

}
catch(Exception ex)
{
MessageBox.Show(ex.Message);

}
}

5. Run your project by clicking in that play button. Input your credentials of gmail enter the phone number in which you want to send SMS and type your Message in respective textbox and then click on Send button. That’s it.

May be after sending 10 SMS your credit will be finished! but don’t be sad you can send more and more SMS but you need to create another account with another email account in www.txtlocal.co.uk ! that’s it. you may not be that much happy to hear this (sending only 10 SMS) but don’t forget you are able to send these 10 SMS for free and also there is one line “To get something, you must lose something”. it means you have to spend some time in creating account in txtlocal.co.uk in order to send free SMS.