// displayname.cs using System; using System.DirectoryServices; class DisplayName { static void Main() { string domain = Environment.UserDomainName; string uName = Environment.UserName; string dName; string path = "WinNT://" + domain + "/" + uName; using (DirectoryEntry dirEnt = new DirectoryEntry(path)) { dName = dirEnt.Properties["FullName"].Value.ToString(); } Console.WriteLine(domain); // 出力例:D-ADVANTAGE Console.WriteLine(uName); // 出力例:taka-e Console.WriteLine(dName); // 出力例:ENDOH, Takanobu } } // コンパイル方法:csc displayname.cs