获取机器名

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Environment.MachineName;
System.Net.Dns.GetHostName();
System.Windows.Forms.SystemInformation.ComputerName;
System.Environment.GetEnvironmentVariable("COMPUTERNAME");

Environment.MachineName
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.

Environment.MachineName and System.Windows.Forms.SystemInformation.ComputerName are identical and returns the computer‘s NetBIOS name. This name is restricted to 15 characters and only visible on the LAN.

System.Net.Dns.GetHostName() returns the computer‘s TCP/IP based hostname. By adding a domain suffix to the hostname you can resolve your computer‘s IP address across LANs / on the internet.

System.Environment.GetEnvironmentVariable("COMPUTERNAME") returns the computer name set during installation. NetBIOS and hostname are initially set to the same name.

获取机器名

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原文地址：http://www.cnblogs.com/dennysong/p/5626275.html