Mailto with attachment

Thanks for the fast answer. Do you see any alternative to create a new email in the default mail program with an atached file?

It depends what you require. If you need to launch client program, so that your user mail account and his/her mail server is used, then without control over this program you can't add any attachment automatically.

If, on the other hand, you don't have to display anything and just send the message using mail account provided by you, then you should be able to add an attachment. Please take a look at answer to this question.

To include attachment, you have to add the following lines to the code from above answer:

 string attachmentPath = @"C:\somefile.txt";
 System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(attachmentPath);
 mail.Attachments.Add(attachment);

There's an important issue related to the ServicePointManager.ServerCertificateValidationCallback used in the code. Basically, it is a way of preventing the certificate errors during access to hosts via SSL. Using it is unsafe, at least in the form from linked code, so that it always return true, ignoring all errors. If you're going to play with this code, you definitely have to read about this callback.

And finally - if callback will be used, it should be initialized once, for example in Awake method of some global object.

That's only a partial example from another post. The mail.Attachments is from the MailMessage class, so it won't work with the Ops question. You forgot to add the most important part. MailMessage mail = new MailMessage(); and use smtp not mailto: