What Wowza webservice are you referring to? Wowza has some XML-formatted information available via the admin host port (8086), like /connectioncounts and /serverinfo. If you're able to call these from a standard web browser (e.g.
http://my-wowza-ip:8086/serverinfo), then you should be able to reach them from you code too.
NB! These "web services" require DIGEST authentication. You must set a username and password in the /conf/admin.password file (this is done at installation with version 4.x, with version 3.x you must do it manually). Remember to implement DIGEST auth in your .NET code.
Wowza does not provide any functions for file transfer. If you want to upload files to your Wowza server, you should look into the usual file transfer options that your server offers, e.g. FTP or maybe HTTP with Content-Range. Make sure the files end up in the /content folder of your Wowza installation, or the folder that you defined as the Content Directory in your Wowza VOD application. There are numerous C# samples of uploading files to a server (
Just use Google)
This is basic Wowza stuff, and doesn't have much to do with your original request about consuming Wowza web services in .NET. From the Wowza test players page, you must put in the IP address (or DNS name), and the port (default 1935) of your server A to start playing. Make sure your computer B and server A can talk to each other (test with e.g. ping) and that the required port(s) are open on the firewall, if there's any.