This property provides access to the program name and any arguments specified on the command line when the current process was started.

The program name can include path information, but is not required to do so. Use the GetCommandLineArgs method to retrieve the command-line information parsed and stored in an array of strings.

The maximum size of the command-line buffer is not set to a specific number of characters; it varies depending on the Windows operating system that is running on the computer.

Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional x64 Edition, Windows Server 2003 Platform Note: The name of the executable file does not include the path.

Windows 98, Windows Millennium Edition Platform Note: The name of the executable file includes the path. Long file names (non-8dot3 names) can be shortened to their 8dot3 representation.

The following example displays its own command line.

' Sample for the Environment.CommandLine property.
Imports System

Class Sample
   Public Shared Sub Main()
      Console.WriteLine()
      '  Invoke this sample with an arbitrary set of command line arguments.
      Console.WriteLine("CommandLine: {0}", Environment.CommandLine)
   End Sub 'Main
End Class 'Sample
'
'This example produces the following results:
'
'C:\>CommandLine ARBITRARY TEXT
'
'CommandLine: CommandLine ARBITRARY TEXT
'

// Sample for the Environment.CommandLine property.
using System;

class Sample 
{
    public static void Main() 
    {
    Console.WriteLine();
//  Invoke this sample with an arbitrary set of command line arguments.
    Console.WriteLine("CommandLine: {0}", Environment.CommandLine);
    }
}
/*
This example produces the following results:

C:\>env0 ARBITRARY TEXT

CommandLine: env0 ARBITRARY TEXT
*/

// Sample for the Environment::CommandLine property.
using namespace System;
int main()
{
   Console::WriteLine();

   //  Invoke this sample with an arbitrary set of command line arguments.
   Console::WriteLine( "CommandLine: {0}", Environment::CommandLine );
}

/*
This example produces the following results:

C:\>env0 ARBITRARY TEXT

CommandLine: env0 ARBITRARY TEXT
*/

.NET Framework

.NET Framework Client Profile

• EnvironmentPermission 

  for read access to the PATH environment variable. Associated enumeration: EnvironmentPermissionAccess..::.Read

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference