i have created a full trust xbap application, that make use of some xml files which i have refered as relative path from bin folder. Problem is, i have to copy those xml file explicitly to root c:\ to make xbap run explicitly. Why it does not refer to the path i have mentioned in my programming and always pick c:\ .

i am storing xml file in Data folder that is located where the bin folder of my project is , that is bin/Data/abc.xml , so i have mentioned ../../Data/abc.xml

Xbap file is located as bin/xbapdebug/proj.xbap

when i use this type of relative path in an exe application it picks xml file from the folder mentioned. i want that application should pick path of those files relativly , from the coding.

A full trust XBAP is not equivalent to an exe. Do you see the same thing with a ClickOnce-deployed standalone app?

Also, are you declaring the XML file in your app's project as Content with the appropriate CopyToOutputDirectory metadata value? If you do that, the XML file will be placed in the right location by the build system and you can use relative URIs to access it. You shouldn't need to dot out (..\..) of your dir. In fact, you can use a leading slash in a relative Uri to denote the reference as relative to the application root.