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C# - Environment.GetEnvironmentVariable() Method with Example

In this tutorial, we will learn about the C# Environment.GetEnvironmentVariable() method with its definition, usage, syntax, and example. By Nidhi Last updated : March 30, 2023

Environment.GetEnvironmentVariable() Method

The Environment.GetEnvironmentVariable() method is used to get the value of the environment variable according to the passed variable.

Syntax

string Environment.GetEnvironmentVariable(string var);

Parameter(s)

var: Environment variable name

Return Value

It returns a string that contains the value of the environment variable.

Exception(s)

System.Security.SecurityException
System.ArgumentNullException

C# Example of Environment.GetEnvironmentVariable() method

The source code to demonstrate the use of GetEnvironmentVariable() method of Environment class is given below. The given program is compiled and executed successfully.

using System;
using System.IO;

class Sample
{
    //Entry point of Program
    static public void Main()
    {
        Environment.CurrentDirectory = Environment.GetEnvironmentVariable("windir");
        DirectoryInfo dirInfomation = new DirectoryInfo(".");
        Console.WriteLine("Windows Directory Information:\n" + dirInfomation.FullName);
    }
}

Output

Directory Information:
C:\Windows
Press any key to continue . . .

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