Using the Environment Class

Click here for a larger image.

Environment: .NET, C#

The .NET Framework takes a much different approach to the Environment than Windows. There is a class called Environment, part of the System namespace. The documentation states:

Use this class to retrieve the following information:

  • Command line arguments
  • Exit codes
  • Environment variable settings
  • Contents of the call stack
  • Time since last system boot
  • Version of the common language runtime

Besides getting all or a particular environment variable(s), there are other objects available. Most objects are read only, and there is no method to set or add a variable. As far as I can tell, only CurrentDirectory and ExitCode can be changed. There is no method to add or modify the environment variables. The most interesting thing I noticed when coding the example C# program was the way GetEnvironmentVariables() worked. The method returns an IDictionary object that represents a collection of key-and-value pairs. Another interesting method is GetFolderPath, which retrieves paths to various system folders.


The following is a C# example of how to retrieve all environment variables.

case 0:
  IDictionary id;
  String sString;

  ArrayList values = new ArrayList();

  m_env_list.Items.Clear ();
  id = Environment.GetEnvironmentVariables();
  foreach (DictionaryEntry myEntry in id)
    sString = myEntry.Key.ToString();
    sString += "=";
    sString += myEntry.Value.ToString();
  m_env_list.SetSelected(0, true);


Download source - 24 Kb


  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Thanks to the Internet of Things (IoT), physical assets are turning into participants in real-time global digital markets. The countless types of assets around us will become as easily indexed, searched and traded as any online commodity. While some industries will be tougher to transform than others – those with physical limitations, such as manufacturing, will be harder to digitize – untold economic opportunities exist for growth and advancement. Our research shows this will create a new "Economy …

  • Lenovo recommends Windows 8 Pro. "I dropped my laptop getting out of the taxi." This probably sounds familiar to most IT professionals. If your employees are traveling, you know their devices are in for a rough go. Whether it's a trip to the conference room or a convention out of town, any time equipment leaves a user's desk it is at risk of being put into harm's way. Stay connected at all times, whether at the office or on the go, with agile, durable, and flexible devices like the Lenovo® …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date