c# - Path.GetTempPath() always returns %USERPROFILE% -

i've written program calls system.io.path.gettemppath() function. documentation i've read (like one) says function should return first path found list:

• the path specified tmp environment variable.
• the path specified temp environment variable.
• the path specified userprofile environment variable.
• the windows directory.

i have defined both tmp , temp environment variables %userprofile%\appdata\local\temp, call gettemppath() returns %userprofile% directory instead of values i've define tmp , temp. how can function return temporary directory i've defined?

that environment setting. http://msdn.microsoft.com/en-us/library/77zkk0b6.aspx

var tmp = environment.getenvironmentvariable("tmp"); 

update: went command prompt , did

set tmp=c:\temp 

then launched visual studio command prompt. environment updated , visual studio sees it. code above (as yours) worked me. displayed updated environment settings.

so believe have kill explorer or logoff in order new environment seen permenantly.