Creating a new directory from C# with Encrypting File System switched on

Question

Has anyone created a new directory from C# with Encrypting File System switched on?

Additionally any information on doing this from an install would be helpful too.

Answer 1

Creating an encrypted directory would be a two step process - create it using Directory.CreateDirectory and then encrypt it using the Win32 function EncryptFile. Sample code -

using System;
using System.IO;
using System.Runtime.InteropServices;

namespace EncryptDir
{
    public class Sample
    {
        DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern bool EncryptFile(string filename);

        public static void Main ()
        {
            Directory.CreateDirectory("MyEncryptedDirectory");
            EncryptFile("MyEncryptedDirectory");
        }
}

References:
EncryptFile Function @ MSDN
Handling encrypted files and directories @ MSDN