ＩＰアドレス・ＭＡＣアドレスを取得するサンプルです。

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// using System.Net.NetworkInformation; NetworkInterface[] nis = NetworkInterface.GetAllNetworkInterfaces(); foreach (NetworkInterface ni in nis) {     if (ni.OperationalStatus == OperationalStatus.Up)     {         // ＭＡＣアドレス         MessageBox.Show(ni.GetPhysicalAddress().ToString());         // ユニキャストＩＰアドレス         IPInterfaceProperties ipip = ni.GetIPProperties();         UnicastIPAddressInformationCollection uipaic = ipip.UnicastAddresses;         foreach (UnicastIPAddressInformation uipai in uipaic)         {             // IPv4             if (uipai.Address.AddressFamily.ToString() == "InterNetwork")             {                 MessageBox.Show(uipai.Address.ToString());             }             /*             // IPv6             if (uipai.Address.AddressFamily.ToString() == "InterNetworkV6")             {                 MessageBox.Show(uipai.Address.ToString());             }             */         }     } }