如何用C#设置本机IP地址/子网/网关/DNS

可以使用C#中的System.Net.NetworkInformation.NetworkInterface类和System.Net.NetworkInformation.IPAddressCollection类来设置本机IP地址/子网/网关/DNS。

首先需要获取本机的网络接口，可以通过以下代码实现：

NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();

然后可以遍历接口列表，找到需要设置的接口。假设我们要设置的是第一个接口，可以通过以下代码获取该接口的IP配置信息：

IPInterfaceProperties ipProperties = interfaces[0].GetIPProperties();

接下来，可以通过以下代码来设置IP地址/子网/网关：

UnicastIPAddressInformation ipInfo = ipProperties.UnicastAddresses[0];
IPAddress ipAddress = ipInfo.Address;
IPAddress subnetMask = ipInfo.IPv4Mask;
GatewayIPAddressInformation gatewayInfo = ipProperties.GatewayAddresses[0];
IPAddress gatewayAddress = gatewayInfo.Address;

最后，可以通过以下代码来设置DNS服务器地址：

ipProperties.DnsAddresses.Clear();
ipProperties.DnsAddresses.Add(IPAddress.Parse("8.8.8.8"));

完整代码如下：

NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();
IPInterfaceProperties ipProperties = interfaces[0].GetIPProperties();
UnicastIPAddressInformation ipInfo = ipProperties.UnicastAddresses[0];
IPAddress ipAddress = ipInfo.Address;
IPAddress subnetMask = ipInfo.IPv4Mask;
GatewayIPAddressInformation gatewayInfo = ipProperties.GatewayAddresses[0];
IPAddress gatewayAddress = gatewayInfo.Address;
ipProperties.DnsAddresses.Clear();
ipProperties.DnsAddresses.Add(IPAddress.Parse("8.8.8.8"));