Issue in adding in line image/gif in Gmail using smtp mail services

Hello Everyone,
I am trying to add an inline image for my birthday reminder bot. I tried several things but can’t able to add inline-image. Is there anyone who has dealt with this kind of issue or someone who knows any activity to add inline images through HTML?

The forum search works great.

I tried this too but nothing works.

What does “nothing works” mean? Error message? Unexpected results?

Yes, Unexpected results. Nothing was added to the email body. The recipient received a blank email.

Show us your code.

Yes Sure, I am also attaching the screenshot of the email.
Main.xaml (20.0 KB)