C#设置Ip地址、网关、子网掩码。DNS

在C#中，可以使用以下代码设置IP地址、网关、子网掩码和DNS：

using System.Management;

public static void SetIP(string ip, string subnetMask, string gateway, string[] dns)
{
    ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection moc = mc.GetInstances();

    foreach (ManagementObject mo in moc)
    {
        if ((bool)mo["IPEnabled"])
        {
            try
            {
                ManagementBaseObject newIP = mo.GetMethodParameters("EnableStatic");

                // Set IP address and subnet mask
                newIP["IPAddress"] = new string[] { ip };
                newIP["SubnetMask"] = new string[] { subnetMask };
                mo.InvokeMethod("EnableStatic", newIP, null);

                // Set default gateway
                ManagementBaseObject newGateway = mo.GetMethodParameters("SetGateways");
                newGateway["DefaultIPGateway"] = new string[] { gateway };
                newGateway["GatewayCostMetric"] = new int[] { 1 };
                mo.InvokeMethod("SetGateways", newGateway, null);

                // Set DNS servers
                ManagementBaseObject newDNS = mo.GetMethodParameters("SetDNSServerSearchOrder");
                newDNS["DNSServerSearchOrder"] = dns;
                mo.InvokeMethod("SetDNSServerSearchOrder", newDNS, null);
            }
            catch (Exception ex)
            {
                // Handle exceptions
            }
        }
    }
}

其中，参数`ip`、`subnetMask`、`gateway`和`dns`分别为要设置的IP地址、子网掩码、网关和DNS服务器列表。注意，需要以管理员权限运行程序才能修改网络配置。