I love ClickOnce and its
semplicity to work, however in these days I'm working on a smart client
project where auto update features are extremely important (we must be sure that
all users always have the last updated application in use) but where I can't use
ClickOnce as a deployment method.
My choice actually was to use the always good Application
Updater Component (used in the past on other
projects like this).
The Application Updater Component configuration is this:
I'm using a manifest check on the server in order to retrieve the last
updates:
<VersionConfig>
<AvailableVersion>1.0.0.0</AvailableVersion>
<ApplicationUrl>http://myserver.com/updates/Version1.0/</ApplicationUrl>
</VersionConfig>
where AvailableVersion specifies the assembly version number of the
latest available version and the ApplicationURL property specifies
the URL where that version of the application resides.
All works good,the application is able to check for new updates and it
downloads the retrieved updates correctly. However, I receive this strange
message:
but I can't understand what could be the cause. The missing part? 
What
missing part? I receive the updates correctly, so why this message?
If anyone has an idea, I'll pay you a coffee... 