When a update is available, does ClickOnce download all files or just the changed files?

I read that only downloads the new files but i see that all "last modification date" file properties change.

Clickonce will download only the changed files. Even though in the update GUI it will show the full size of the app itself.

Clickonce will download only the changed files. Even though in the update GUI it will show the full size of the app itself.

Thanks !!

Guys I have a MS Exam test tomorrow please help me with this question:

According to a prepration test on the CD of official MS 070-527 book,




You create a Windows Forms application named MyApp and publish it using Visial Studio to a UNC path using ClickOnce. You configure the application to automatically look for updates.

How does Click-One determine which files to download? (choose all that apply)

1) ClickOnce compares hash signatures of the files specified in the application manifest. If the signatures are different ClickOnce downloads the new version.

2) ClickOnce downloads all files, regardless of their version number.

3) ClickOnce compares date stamps of the files. if the date stamp is newer, ClickOne downloads the updated file.

4) ClockOne compares version numbers stored in the metadata of the files. if the version number is higher, Clickone downloads the new version.

Explanation:
Clickone determines which files to download by checking the hash signatures in the application manifest. ClickOnce download sonly those files that have been updated.


I thought Correct would be only 1) and 3). However the test marks 1), 2) and 3) as correct answers. Wht 2)? I think it stands in contradiction to the other two?

Please help..

I think that is only the answer number 1.

Regards.