c# - write to the file system in a directory -


i write file system in directory c: \ directory name, moment have code:

if (! system.io.file.exists (httpcontext.current.server.mappath (filename))) {    txtfile = new system.io.streamwriter (httpcontext.current.server.mappath (filename)); } else {    txtfile = system.io.file.appendtext (httpcontext.current.server.mappath (filename)); }

but in way writes on application folder. how fix it?

just do

path.combine(@"c:\", filename)

instead of 

httpcontext.current.server.mappath (filename)

ensure application has write access destination.


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