1

.NET allows me to create and access values that are persistent between sessions.
Is it possible to use environment variables such as %WINDIR%, %APPDATA% and others?
If so, how would I go about doing this?

Sk93
  • 3,676
  • 3
  • 37
  • 67
  • Are you talking about [Environment Variables](http://msdn.microsoft.com/en-us/library/windows/desktop/ms682653(v=vs.85).aspx) ? if so then see [How do I get and set Environment variables in C#?](http://stackoverflow.com/questions/185208/how-do-i-get-and-set-environment-variables-in-c) – Habib May 24 '13 at 07:17

1 Answers1

3

If you have this in the config:

 <appSettings>
   <add key="SomePath" value="%TEMP%"/>
 </appSettings>

Then from code you'd do something like:

string path = ConfigurationManager.AppSettings["SomePath"];
string fullPath = System.Environment.ExpandEnvironmentVariables(path);
Dimitar Dimitrov
  • 14,868
  • 8
  • 51
  • 79
  • So, this would change the path `%TEMP%/foobar` into `C:/Windows/Temp/foobar/`, right? –  May 24 '13 at 07:51
  • 1
    And the upvotes and marked answer go to.. Thanks, this will help me greatly. –  May 24 '13 at 08:09