C#由IP地址获取对应的网卡MAC地址，基于Iphlpapi.dll，主线程之外的线程要调用main线程中建立的控件，需要使用委托的方式。请确保网络是正常的，否则获取不到MAC地址。-C# to obtain the IP address corresponding to the MAC address, thread-based Iphlpapi.dll, outside the main thread to call the controls created in the main thread, you need to use a delegate approach. Please ensure that the network is normal, otherwise acquire less than MAC addresses.