Hi, I need a little bit of help here.

I am trying to use SharpDX.WIC.BitmapDecoder class to convert my image to bitmap.

It is working fine with the images that are located in my local, but it's not working

when I try to convert the image that are imported by outside such as internet URL.

What could be the problem?

WIC is supposed to work on a random access stream (for example, in order to read the header to detect what kind of image format...etc. and then re-seek to the beginning of the stream), so in your use case, you have to fully pre-load the image in a memorystream.