streamwriter - Unable to write to text file in VB.NET -

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i have tried 10+ different streamwriter examples found on web (including msdn.microsoft.com) write file vb.net program, text file never created , existing text file created never appended to.

i gave full permissions write file created including directory. don't know i'm missing. program runs , not give errors. not see error in event viewer. there else can prevent program adding file? below 1 example i've tried using:

system.io.file.appendalltext("c:\log\mylog.txt", "-------test 1-------" & vbcrlf)


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