// CS0246: The type or namespace name `RNGCryptoServiceProvider' could not be found. Are you missing `System.Security.Cryptography' using directive? // Line: 13 using System; namespace System.Web.Configuration { class MachineKeyConfig { static MachineKeyConfig () { autogenerated = new byte [64]; RNGCryptoServiceProvider cp = new RNGCryptoServiceProvider (); cp.GetBytes (autogenerated); } } }