System.Net.IntPtrHelper.Add C# (CSharp) Method

        internal static IntPtr Add(IntPtr a, int b) {
            return (IntPtr) ((long)a + (long)b);
        }
    }

        /*
         *  This is to support SSL under semi trusted environment.
         *  Note that it is only for SSL with no client cert
         *
         *  Important: safeHandle should not be Disposed during construction of this object.
         */
        internal SecurityPackageInfoClass(SafeHandle safeHandle, int index)
        {
            if (safeHandle.IsInvalid)
            {
                GlobalLog.Print("SecurityPackageInfoClass::.ctor() the pointer is invalid: " + (safeHandle.DangerousGetHandle()).ToString("x"));
                return;
            }
            IntPtr unmanagedAddress = IntPtrHelper.Add(safeHandle.DangerousGetHandle(), SecurityPackageInfo.Size * index);

            GlobalLog.Print("SecurityPackageInfoClass::.ctor() unmanagedPointer: " + ((long)unmanagedAddress).ToString("x"));

            Capabilities = Marshal.ReadInt32(unmanagedAddress, (int)Marshal.OffsetOf <SecurityPackageInfo>("Capabilities"));
            Version      = Marshal.ReadInt16(unmanagedAddress, (int)Marshal.OffsetOf <SecurityPackageInfo>("Version"));
            RPCID        = Marshal.ReadInt16(unmanagedAddress, (int)Marshal.OffsetOf <SecurityPackageInfo>("RPCID"));
            MaxToken     = Marshal.ReadInt32(unmanagedAddress, (int)Marshal.OffsetOf <SecurityPackageInfo>("MaxToken"));

            IntPtr unmanagedString;

            unmanagedString = Marshal.ReadIntPtr(unmanagedAddress, (int)Marshal.OffsetOf <SecurityPackageInfo>("Name"));
            if (unmanagedString != IntPtr.Zero)
            {
                Name = Marshal.PtrToStringUni(unmanagedString);
                GlobalLog.Print("Name: " + Name);
            }

            unmanagedString = Marshal.ReadIntPtr(unmanagedAddress, (int)Marshal.OffsetOf <SecurityPackageInfo>("Comment"));
            if (unmanagedString != IntPtr.Zero)
            {
                Comment = Marshal.PtrToStringUni(unmanagedString);
                GlobalLog.Print("Comment: " + Comment);
            }

            GlobalLog.Print("SecurityPackageInfoClass::.ctor(): " + ToString());
        }