c# - Directory.CreateDirectory from [TestMethod] behaves strangely -

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i'm in dark on one... i've created batch processing code, , have several tests setup directory structure before calling method tested. problem can illustrated by

    [testmethod]     public void stupidtest()     {         directory.createdirectory("./xxx");         assert.istrue(directory.exists("./xxx"));         //new fileinfo( "./xxx/yyy.txt").create().close();     }

when last line commented out, tests runs perfectly, in "out" folder of testresults, no folder created. when last line included, test runs well, , both xxx folder , yyy.txt file exist in "out" folder test run. if last line of test included in body, test fails, complaining non-existant path.

i found references mentioning file system virtualization, , test app not having enough permissions create folders in "out" folder.

any appreciated!

can try , use processmonitor (from ms download site,free), , record of activities of process, , can see if directory gets created, moved , deleted , on.


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