Environment.MachineName Property

The name of this computer is established at system startup when the name is read from the registry. If this computer is a node in a cluster, the name of the node is returned.

The following example displays the name of the computer that runs the code example. (The machine name is omitted from the example output for security reasons.)

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

class Sample 
{
    public static void Main() 
    {
    Console.WriteLine();
//  <-- Keep this information secure! -->
    Console.WriteLine("MachineName: {0}", Environment.MachineName);
    }
}
/*
This example produces the following results:
(Any result that is lengthy, specific to the machine on which this sample was tested, or reveals information that should remain secure, has been omitted and marked "!---OMITTED---!".)

MachineName: !---OMITTED---!
*/

.NET Framework

.NET Framework Client Profile

• EnvironmentPermission 

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

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference