Request URL with HTTP or HTTPS in C#

Question

I have two inputs for set urls, first for image and second for some site

I must to load image and site in iframe

If user set url with scheme everything is ok, the problems spears when url does not contains the scheme ' http:// ' or ' https:// '

how to add right scheme to url

make a request to ' http:// ' + my_url and check if the code if is 404 make another request to ' https:// ' + my_url

Answer 1

I think this one can help you if you mean this what i think.

How can I catch a 404? if there's a 404 you run the same code with and without "https" it's on you on which one you start "requesting".