Changing the scheme of System.Uri

Question

I\'m looking for canonical way of changing scheme of a given System.Uri instance with System.UriBuilder without crappy string manipulations and magic constants. Say I have

Answer 1

UserControl's answer works fine unless you have to make sure non-default ports are preserved in the URI.

For instance, http://localhost:12345/hello should become https://localhost:12345/hello instead of https://localhost/hello.

Here's how to do that easily:

public static string ForceHttps(string requestUrl)
{
    var uri = new UriBuilder(requestUrl);

    var hadDefaultPort = uri.Uri.IsDefaultPort;
    uri.Scheme = Uri.UriSchemeHttps;
    uri.Port = hadDefaultPort ? -1 : uri.Port;

    return uri.ToString();
}

Note that we have to read uri.Uri.IsDefaultPort before setting uri.Scheme.

Here is a working example: https://dotnetfiddle.net/pDrF7s