[IronPython] Writing to a file with unicode name

[abdalla ramadan]

Hello,

I am trying to write to a file with the japanese name 青山学院大学相模原キャンパス
The relative path I am passing to the methods is
"output\url\c\青山学院大学相模原キャンパス"

I used two methods
s = StreamWriter(filenamenew, True, Encoding.UTF8)
and
outputfile = codecs.open(filenamenew, "w",'utf_8_sig')

which both throwed the following exception:
Unhandled Exception: System.ArgumentException: Illegal characters in path.

Thanks very much for advance.
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