Environment.GetEnvironmentVariables Method (EnvironmentVariableTarget)
Retrieves all environment variable names and their values from the current process, or from the Windows operating system registry key for the current user or local machine.
Assembly: mscorlib (in mscorlib.dll)
static member GetEnvironmentVariables : target:EnvironmentVariableTarget -> IDictionary
Return ValueType: System.Collections.IDictionary
A dictionary that contains all environment variable names and their values from the source specified by the target parameter; otherwise, an empty dictionary if no environment variables are found.
The target parameter specifies whether the source is the current process, the registry key for the current user, or the registry key for the local machine.
The names and values of the environment variables are stored as key/value pairs in the returned IDictionary object.
The following example creates environment variables for the Process, User, and Machine targets, checks whether the operating system registry contains the User and Machine environment variables, then deletes the environment variables.
Available since 2.0