Environment.GetEnvironmentVariable Method (String, EnvironmentVariableTarget)
Retrieves the value of an environment variable 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 GetEnvironmentVariable : variable:string * target:EnvironmentVariableTarget -> string
- Type: System.String
The name of an environment variable.
Return ValueType: System.String
The value of the environment variable specified by the variable and target parameters, or a null reference (Nothing in Visual Basic) if the environment variable is not found.
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.