直接上一段用于内网获取本机ip地址的方法，更全面的可以先获取本机网络类型，在获取ip

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1. /// <summary>  
2.        /// 获取本地连接ip  
3.        /// </summary>  
4.        /// <returns></returns>  
5.        private string getLocalIp()  
6.        {  
7.            NetworkInterface[] interfaces = System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces();  
8.            int len = interfaces.Length;  
9.            string localIP = "未找到";  
10.            for (int i = 0; i < len; i++)  
11.            {  
12.                NetworkInterface ni = interfaces[i];  
13.                if (ni.NetworkInterfaceType == NetworkInterfaceType.Ethernet || ni.NetworkInterfaceType == NetworkInterfaceType.Wireless80211)  
14.                {  
15.                    if (ni.Name == "本地连接" || ni.Name=="无线网络连接")  
16.                    {  
17.                        IPInterfaceProperties property = ni.GetIPProperties();  
18.                        foreach (UnicastIPAddressInformation ip in   property.UnicastAddresses)  
19.                        {  
20.                            if (ip.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)  
21.                            {  
22.                               localIP= ip.Address.ToString();  
23.                            }  
24.                        }  
25.                    }  
26.                }  
27.   
28.            }  
29.            return localIP;  
30.        }