使用Environment 来获取系统的信息

Environment 类可检索信息，如命令行参数、退出代码、环境变量设置、调用堆栈的内容、上次系统引导以来的时间，以及公共语言运行库的版本

Console.WriteLine("命令行: {0}", Environment.CommandLine);
String[] arguments = Environment.GetCommandLineArgs();
Console.WriteLine("命令行参数的字符串数组: {0}", String.Join(", ", arguments));

Console.WriteLine("当前目录: {0}", Environment.CurrentDirectory);
Console.WriteLine("机器名: {0}", Environment.MachineName);
Console.WriteLine("系统换行符: {0} 第1行{0} 第2行{0} 第3行",
Environment.NewLine);
Console.WriteLine("平台标识符和版本号: {0}", Environment.OSVersion.ToString());

Console.WriteLine("系统目录: {0}", Environment.SystemDirectory);
Console.WriteLine("毫秒数: {0}", Environment.TickCount);
Console.WriteLine("域: {0}", Environment.UserDomainName);
Console.WriteLine("交互模式: {0}", Environment.UserInteractive);
Console.WriteLine("用户名: {0}", Environment.UserName);
Console.WriteLine("版本: {0}", Environment.Version.ToString());

Console.WriteLine("临时目录{0}.",
Environment.GetEnvironmentVariable("TEMP")); //临时目录
Console.WriteLine("得到系统环境变量: ");
IDictionary environmentVariables = Environment.GetEnvironmentVariables();
foreach (DictionaryEntry de in environmentVariables)
{
Console.WriteLine(" {0} = {1}", de.Key, de.Value);
}
Console.WriteLine("系统目录: {0}",
Environment.GetFolderPath(Environment.SpecialFolder.System));
String[] drives = Environment.GetLogicalDrives();
Console.WriteLine("磁盘: {0}", String.Join(", ", drives));