What is the C# equivalent for the Java System.exit(0)?

The C# equivalent for Java's System.exit(0) is the Environment.Exit() method. This method terminates the current process and returns an exit code to the operating system, just like its Java counterpart.

Syntax

Following is the syntax for using Environment.Exit() −

Environment.Exit(exitCode);

Parameters

• exitCode − An integer value returned to the operating system. Use 0 to indicate successful termination, and non-zero values to indicate different error conditions.

Exit Code Conventions

Example

using System;

class Program {
   static void Main(string[] args) {
      Console.WriteLine("Starting application...");
      
      // Simulate some processing
      bool processSuccessful = true;
      
      if (processSuccessful) {
         Console.WriteLine("Process completed successfully!");
         Environment.Exit(0);  // Success
      } else {
         Console.WriteLine("Process failed!");
         Environment.Exit(1);  // Error
      }
      
      // This line will never execute
      Console.WriteLine("This won't be printed");
   }
}

The output of the above code is −

Starting application...
Process completed successfully!

Using Different Exit Codes

using System;
using System.IO;

class FileProcessor {
   static void Main(string[] args) {
      string fileName = "data.txt";
      
      Console.WriteLine("Checking file: " + fileName);
      
      if (!File.Exists(fileName)) {
         Console.WriteLine("Error: File not found!");
         Environment.Exit(1);  // File not found
      }
      
      // Simulate file format check
      bool isValidFormat = false;
      
      if (!isValidFormat) {
         Console.WriteLine("Error: Invalid file format!");
         Environment.Exit(2);  // Invalid format
      }
      
      Console.WriteLine("File processed successfully!");
      Environment.Exit(0);  // Success
   }
}

The output of the above code is −

Checking file: data.txt
Error: File not found!

Comparison with Java

Conclusion

The Environment.Exit() method is the C# equivalent of Java's System.exit(). It immediately terminates the current process and returns an exit code to the operating system. Use exit code 0 for success and non-zero values for different error conditions.