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I have a favorite Tag including a wildcard [wpf*] in my Favorite Tags list to get all question tagged with wpf. (Currently 63,210 question)

Now when i click on a Related Tag, such as [c#] (the count behind the tag states that there are 26,324 question), the c#-Tag gets ignored and the result is still all the 63,210 questions.

The result of the tag-filtering above, should be equal to the search [wpf*] [c#] is:question

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I think the issue is not only with favorite tags but also with any tags including a wildcard. – hims056 Apr 15 '13 at 7:19
@hims056 yes indeed – Jehof Apr 15 '13 at 7:23

It looks like what is happening is that the "and" is implicit with the last tag only; for example, the link for clicking on is:

<a href="/questions/tagged/wpf+or+wpf-controls+or+wpfdatagrid+or+wpftoolkit+or+wpf-4.0+or+wpf-positioning+or+wpf-4.5+or+wpf-animation+or+wpf-interop+or+wpf-brushes+c%23" class="post-tag js-gps-track" title="" rel="tag">c#</a>

so the "and" is binding only to and . The query-string does not currently support arbitrary combinations of "and" and "or"... I can't think of a nice way of expressing this, to be honest.

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What about parentheses? (wpf or wpf-controls) and c# – michaelb958 Jan 30 '14 at 21:09
@michaelb958 oddly enough, the backend "list stuff by tag" can cope with that, but that would involve a significant amount of change to the UI code; otherwise I'd have already done it ;p – Marc Gravell Jan 31 '14 at 7:44

A workaround to get the results for [wpf*] and the related tag [c#] is by using the search engine of SO

[wpf*][c#] is:question

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