Question

Suppose I want to create an Uri object from the following string:

string url = @"http://someserver.com?param1=1&url=http%3a%2f%2fwww.otherserver.com";
Uri uri = new Uri(url, UriKind.Absolute);

Expected result would be:

http://someserver.com?param1=1&url=http%3a%2f%2fwww.otherserver.com 

Obtained:

http://someserver.com/?param1=1&url=http://www.otherserver.com

The same behavior is noticed in many related methods that allow Uri creation: Uri.TryCreate, UriBuilder.Uri, etc.

How would I get an Uri that preserve initial encoded parameter?

Answer 1

This behavior is documented:

As part of canonicalization in the constructor for some schemes,
escaped representations are compacted. The schemes for which URI will
compact escaped sequences include the following: file, http, https,
net.pipe, and net.tcp. For all other schemes, escaped sequences are
not compacted. For example: if you percent encode the two dots “..” as
“%2E%2E” then the URI constructor will compact this sequence for some
schemes. For example, the following code sample shows a URI
constructor for the http scheme.

So one workaround might be temporarily using a custom scheme (e.g. leavemealone://) to construct the URL objects (possibly through UriBuilder?).