Class that gives access to NTFS Alternate Data Streams

AlternateDataStream.cs

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

namespace ADS
{
    public static class AlternateDataStream
    {
        public static FileStream Open(string path, string streamName, FileMode mode)
        {
            return Open(path, streamName, mode, (mode == FileMode.Append) ? FileAccess.Write : FileAccess.ReadWrite, FileShare.None);
        }

        public static FileStream Open(string path, string streamName, FileMode mode, FileAccess access)
        {
            return Open(path, streamName, mode, access, FileShare.None);
        }

        public static FileStream Open(string path, string streamName, FileMode mode, FileAccess access, FileShare share)
        {
            string fullPath = AppendStreamName(path, streamName);
            var handle = NativeMethods.CreateFile(fullPath, (uint) access, (uint) share, IntPtr.Zero, (uint) mode, 0, IntPtr.Zero);
            if (handle.IsInvalid)
            {
                var hr = Marshal.GetHRForLastWin32Error();
                Marshal.ThrowExceptionForHR(hr);
            }
            return new FileStream(handle, access);
        }

        public static FileStream OpenRead(string path, string streamName)
        {
            return Open(path, streamName, FileMode.Open, FileAccess.Read, FileShare.Read);
        }

        public static FileStream OpenWrite(string path, string streamName)
        {
            return Open(path, streamName, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
        }

        public static void Delete(string path, string streamName)
        {
            string fullPath = AppendStreamName(path, streamName);
            NativeMethods.DeleteFile(fullPath);
        }

        private static string AppendStreamName(string fileName, string streamName)
        {
            return fileName + ":" + streamName;
        }
    }
}