Send animated GIF via e-mail in C#

Question

I'm trying to send an animated GIF via e-mail using a Gmail account. I can send normal picture with this code:

MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress("my adress", "Kinomaton");
mail.To.Add(richTextBox1.Text);
mail.Subject = Kinomaton.Properties.Settings.Default.objet;
mail.Body = Kinomaton.Properties.Settings.Default.mail;
System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment(@"F:\gif_temp\gif" + (Kinomaton.Properties.Settings.Default.folder - 1) + "\\gif_final3.jpg");
mail.Attachments.Add(attachment);
SmtpServer.Port = 587;
SmtpServer.Credentials = new System.Net.NetworkCredential("my adress", "my password");
SmtpServer.EnableSsl = true;
SmtpServer.Timeout = 500000000;
SmtpServer.Send(mail);

The problem is that when I try to replace the .jpg file by a .gif file, it doesn't work. Anyone can help me please ?

Answer 1

Step 1: Upload the gif to imgur

Step 2: Send an email containing the link to your gif

Step 3: Party

This will ensure that the recipient can actually view the gif. As mentioned in the comments, alot of email clients wont display gifs anyways.

*Edit* To upload the file via code:

using (var w = new WebClient())
{
    var values = new NameValueCollection
    {
        { "key", "<api-key>" },
        { "image", Convert.ToBase64String(File.ReadAllBytes(@"<file>")) }
    };

    byte[] response = w.UploadValues("http://imgur.com/api/upload.xml", values);

    Console.WriteLine(XDocument.Load(new MemoryStream(response)));
}

The output will tell you what the link of the file is on Imgur so you can send it to whoever.