public static string getLocalhostName(){return Environment.GetEnvironmentVariable("COMPUTERNAME");}

public static string getLocalhostMac() {string mac = null;ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");ManagementObjectCollection queryCollection = query.Get();foreach (ManagementObject mo in queryCollection) {if (mo["IPEnabled"].ToString() == "True")mac = mo["MacAddress"].ToString();}return (mac);
}

public static string getComputerName() {return Environment.MachineName;
}

public static string getResolution() {return SystemInformation.PrimaryMonitorMaximizedWindowSize.Width + " x " + SystemInformation.PrimaryMonitorMaximizedWindowSize.Height;
}

public static string getMainResolution() {return SystemInformation.PrimaryMonitorSize.Width + " x " + SystemInformation.PrimaryMonitorSize.Height;
}

[DllImport("kernel32")]
public static extern void GetSystemDirectory(StringBuilder SysDir, int count);public static string getSystemPath() {const int nChars = 128;StringBuilder Buff = new StringBuilder(nChars);GetSystemDirectory(Buff, nChars);return Buff.ToString();
}

public static string getSystemType() {string st = "";ManagementClass mc = new ManagementClass("Win32_ComputerSystem");ManagementObjectCollection moc = mc.GetInstances();foreach (ManagementObject mo in moc) {st = mo["SystemType"].ToString();}return st;
}

public static string getOSBit() {if (Environment.Is64BitOperatingSystem) {return "64bit."} else {return  "32bit.";}
}

public static string getOSVersion()  {return Environment.OSVersion.VersionString;
}

public static string getProcessorCount()  {return Environment.ProcessorCount.ToString();
}

public static int getCpuCount() {try {using (ManagementClass mCpu = new ManagementClass("Win32_Processor")) {ManagementObjectCollection cpus = mCpu.GetInstances();return cpus.Count;}} catch { }return -1;
}

public static string getCpuVersion() {string st = "";ManagementObjectSearcher mos = new ManagementObjectSearcher("Select * from Win32_Processor");foreach (ManagementObject mo in mos.Get()) {st = mo["Version"].ToString();}return st;
}

public static string getCpuName() {string st = "";ManagementObjectSearcher driveID = new ManagementObjectSearcher("Select * from Win32_Processor");foreach (ManagementObject mo in driveID.Get()) {st = mo["Name"].ToString();}return st;
}

public static string getCpuSerialNumber() {string strCpu = null;ManagementClass myCpu = new ManagementClass("win32_Processor");ManagementObjectCollection myCpuConnection = myCpu.GetInstances();foreach (ManagementObject myObject in myCpuConnection) {strCpu = myObject.Properties["Processorid"].Value.ToString();break;}return strCpu;
}

public static string getCPUManufacturer() {string st = "";ManagementObjectSearcher mos = new ManagementObjectSearcher("Select * from Win32_Processor");foreach (ManagementObject mo in mos.Get()) {st = mo["Manufacturer"].ToString();}return st;
}

这里之所以使用string类型的数组，主要是因为cpu的多核

public static string[] getCpuMHZ() {ManagementClass mc = new ManagementClass("Win32_Processor");ManagementObjectCollection cpus = mc.GetInstances(); string[] mHz = new string[cpus.Count];int c = 0;ManagementObjectSearcher mySearch = new ManagementObjectSearcher("select * from Win32_Processor");foreach (ManagementObject mo in mySearch.Get()) {mHz[c] = mo.Properties["CurrentClockSpeed"].Value.ToString();c++;}mc.Dispose();mySearch.Dispose();return mHz;
}

public static string getVideoPNPID() {string st = "";ManagementObjectSearcher mos = new ManagementObjectSearcher("Select * from Win32_VideoController");foreach (ManagementObject mo in mos.Get()) {st = mo["PNPDeviceID"].ToString();}return st;
}

public static string getDiskVolumeSerialNumber() {ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");ManagementObject disk = new ManagementObject("win32_logicaldisk.deviceid=\"c:\"");disk.Get();return disk.GetPropertyValue("VolumeSerialNumber").ToString();
}

public static string getSizeOfDisk() {ManagementClass mc = new ManagementClass("Win32_DiskDrive");ManagementObjectCollection moj = mc.GetInstances();foreach (ManagementObject m in moj) {return m.Properties["Size"].Value.ToString();}return "-1";
}

public static string getHardDiskSerialNumber() {try {ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");string sHardDiskSerialNumber = "";foreach (ManagementObject mo in searcher.Get()) {sHardDiskSerialNumber = mo["SerialNumber"].ToString().Trim();break;}return sHardDiskSerialNumber;}catch {return "";}
}

public static string getBIOSSerialNumber() {try {ManagementObjectSearcher searcher = new ManagementObjectSearcher("Select * From Win32_BIOS");string sBIOSSerialNumber = "";foreach (ManagementObject mo in searcher.Get()) {sBIOSSerialNumber = mo["SerialNumber"].ToString().Trim();}return sBIOSSerialNumber;}catch {return "";}
}

public static string getBoardManufacturer() {SelectQuery query = new SelectQuery("Select * from Win32_BaseBoard");ManagementObjectSearcher mos = new ManagementObjectSearcher(query);ManagementObjectCollection.ManagementObjectEnumerator data = mos.Get().GetEnumerator();data.MoveNext();ManagementBaseObject board = data.Current;return board.GetPropertyValue("Manufacturer").ToString();
}

public static string getBoardID() {string st = "";ManagementObjectSearcher mos = new ManagementObjectSearcher("Select * from Win32_BaseBoard");foreach (ManagementObject mo in mos.Get()) {st = mo["SerialNumber"].ToString();}return st;
}

public static string getBoardType() {string st = "";ManagementObjectSearcher mos = new ManagementObjectSearcher("Select * from Win32_BaseBoard");foreach (ManagementObject mo in mos.Get()) {st = mo["Product"].ToString();}return st;
}

public static string getPhysicalMemory() {string st = "";ManagementClass mc = new ManagementClass("Win32_ComputerSystem");ManagementObjectCollection moc = mc.GetInstances();foreach (ManagementObject mo in moc) {st = mo["TotalPhysicalMemory"].ToString();}return st;
}

[DllImport("kernel32")]
private static extern void GlobalMemoryStatus(ref StorageInfo memibfo);[StructLayout(LayoutKind.Sequential)]
public struct StorageInfo //此处全是以字节为单位 {public uint dwMemoryLoad;//内存使用率
}public static string getUtilizationRate() {StorageInfo memInfor = new StorageInfo();GlobalMemoryStatus(ref memInfor);return memInfor.dwMemoryLoad.ToString("0.0");
}

public static string getMacAddress() {string mac = "";ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");ManagementObjectCollection moc = mc.GetInstances();foreach (ManagementObject mo in moc) {if ((bool)mo["IPEnabled"] == true) {mac = mo["MacAddress"].ToString();break;}}return mac;
}

public static string getNetCardMACAddress() {try {ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapter WHERE ((MACAddress Is Not NULL) AND (Manufacturer <> 'Microsoft'))");string NetCardMACAddress = "";foreach (ManagementObject mo in searcher.Get()) {NetCardMACAddress = mo["MACAddress"].ToString().Trim();}return NetCardMACAddress;}catch {return "";}
}

public static NetworkInterface[] getNetWorkInfo() {NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();return adapters;
}
// 设置内容向文本框
public void setContent() {tb_net_work_adapter_num.Text = adapters.Length.ToString();int index = 0;foreach (NetworkInterface adapter in adapters) {index++;//显示网络适配器描述信息、名称、类型、速度、MAC 地址tb_net_wark_adapter_info.Text = tb_net_wark_adapter_info.Text + ("---------------------第" + index + "个适配器信息---------------------") + "\n";tb_net_wark_adapter_info.Text = tb_net_wark_adapter_info.Text + ("描述信息：" + adapter.Name) + "\n";tb_net_wark_adapter_info.Text = tb_net_wark_adapter_info.Text + ("类型：" + adapter.NetworkInterfaceType) + "\n";tb_net_wark_adapter_info.Text = tb_net_wark_adapter_info.Text + ("速度：" + adapter.Speed / 1000 / 1000 + "MB") + "\n";tb_net_wark_adapter_info.Text = tb_net_wark_adapter_info.Text + ("MAC 地址：" + adapter.GetPhysicalAddress()) + "\n";//获取IPInterfaceProperties实例IPInterfaceProperties adapterProperties = adapter.GetIPProperties();//获取并显示DNS服务器IP地址信息IPAddressCollection dnsServers = adapterProperties.DnsAddresses;if (dnsServers.Count > 0) {foreach (IPAddress dns in dnsServers) {tb_net_wark_adapter_info.Text = tb_net_wark_adapter_info.Text + ("DNS 服务器IP地址：" + dns + "\n");}} else {tb_net_wark_adapter_info.Text = tb_net_wark_adapter_info.Text + ("DNS 服务器IP地址：" + "\n");}}
}

结果样例
---------------------第1个适配器信息---------------------
描述信息：以太网
类型：Ethernet
速度：0MB
MAC 地址：9883892C3E84
DNS 服务器IP地址：192.168.0.0
---------------------第2个适配器信息---------------------
描述信息：VirtualBox Host-Only Network #3
类型：Ethernet
速度：1000MB
MAC 地址：0A002700000B
DNS 服务器IP地址：fec0:0:0:ffff::1%1
DNS 服务器IP地址：fec0:0:0:ffff::2%1
DNS 服务器IP地址：fec0:0:0:ffff::3%1
…

public static string getSoundPNPID() {string st = "";ManagementObjectSearcher mos = new ManagementObjectSearcher("Select * from Win32_SoundDevice");foreach (ManagementObject mo in mos.Get()) {st = mo["PNPDeviceID"].ToString();}return st;
}

public static string getMouseButtons()  {return SystemInformation.MouseButtons.ToString();
}

public static string getIsHasNet() {if (SystemInformation.Network) {return  "网络连接:已连接";} else {return "网络连接:未连接";}
}

public static string getIP() {try {string st = "";ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");ManagementObjectCollection moc = mc.GetInstances();foreach (ManagementObject mo in moc) {if ((bool)mo["IPEnabled"] == true) {System.Array ar;ar = (System.Array)(mo.Properties["IpAddress"].Value);st = ar.GetValue(0).ToString();break;}}moc = null;mc = null;return st;} catch {return "unknow";}
}