How to run WPF – XBAP as Full Trust Application

Recently I work on WPF-XBAP application that will run from intranet website:

This application must have unrestricted access to client's OS resources (that is unusual for XBAP projects):

I publish it on local website by using "Click-Once" deployment mechanism:

User can launch the application from deployment page (also can run application setup):

I get security error ("User has refused to grant required permissions to the application"):

Means that application tried to perform some restricted action, beyond of XBAP sandbox. Actually it tried to read local video file:

(It reads video file from local source, for preview option before uploading it to FTP server)

After some research I found how to fix that:

(1) Project must be signed with "Click-Once" manifest (security certificate file):

(If project doesn't contain "Test Certificate" click on rounded button to create a new one)

(2) After temporary certificate was created we'll save it into file (click on "More Details"):

File export wizard (step A):

File export wizard (step B):

File export wizard (step C): 
(Enter username and password, only if you did so while "Test Certificate" creation in par. 1)

File export wizard (step D):

File export wizard (step E):

File export wizard (step F):

(Now project certificate is saved as external file)

(3) Now we'll go to Internet Explorer and will register this certificate: 
(Open "Internet Options" from "Tools" menu)

Click on "Certificates" in "Content" tab:

Import certificate file from "Trusted Root Certification Authorities" tab:

File import wizard (step A):

File import wizard (step B):

File import wizard (step C):

File import wizard (step D):

Confirm importing:

If succeed you'll get this window:

And will see certificate here:

Do same in "Trusted Publishers" tab:

Close IE options:

(6) No we'll go to "Signing" tab in project options and will select registered certificate:

Select registered certificate from local store:

(5) Republish the application:

Now XBAP can run in "Full Trusted" mode:

Hope this post was helpful 

from:http://blogs.microsoft.co.il/maxim/2008/03/05/how-to-run-wpf-xbap-as-full-trust-application/