image blank while using Image.Url tag

hi guys , i’m running into a little issue, i just want to display an image using my url

<ImageFill  Url=";  StretchMode="UniformToFill" />

result ==> blank image

You are serving that image with a .txt extension and a Content-Type: text/plain from your server. Try to change to .png and Content-Type: image/png then it should work.