ArgusTV.Recorders.Common.ShareExplorer.GetShareInfoNT C# (CSharp) Метод

        private static List<ShareInfo> GetShareInfoNT(string serverName, IList<ShareType> shareTypes)
        {
            int level = 2;
            int entriesRead, totalEntries, nRet, hResume = 0;
            IntPtr pBuffer = IntPtr.Zero;
            List<ShareInfo> shareInfoList = new List<ShareInfo>();

            try
            {
                nRet = NetShareEnum(serverName, level, out pBuffer, -1, out entriesRead, out totalEntries, ref hResume);

                if (nRet == ERROR_ACCESS_DENIED)
                {
                    //Need admin for level 2, drop to level 1
                    level = 1;
                    nRet = NetShareEnum(serverName, level, out pBuffer, -1, out entriesRead, out totalEntries, ref hResume);
                }

                if (nRet == NO_ERROR && entriesRead > 0)
                {
                    Type t = (level == 2) ? typeof(SHARE_INFO_2) : typeof(SHARE_INFO_1);
                    int offset = Marshal.SizeOf(t);

                    for (int i = 0, lpItem = pBuffer.ToInt32(); i < entriesRead; i++, lpItem += offset)
                    {
                        IntPtr pItem = new IntPtr(lpItem);
                        if (level == 1)
                        {
                            SHARE_INFO_1 shareInfo = (SHARE_INFO_1)Marshal.PtrToStructure(pItem, t);
                            if (shareTypes.Contains(shareInfo.ShareType))
                            {
                                shareInfoList.Add(new ShareInfo(serverName, shareInfo.NetName, string.Empty, shareInfo.ShareType, shareInfo.Remark));
                            }
                        }
                        else
                        {
                            SHARE_INFO_2 shareInfo = (SHARE_INFO_2)Marshal.PtrToStructure(pItem, t);
                            if (shareTypes.Contains(shareInfo.ShareType))
                            {
                                shareInfoList.Add(new ShareInfo(serverName, shareInfo.NetName, shareInfo.Path, shareInfo.ShareType, shareInfo.Remark));
                            }
                        }
                    }
                }
            }
            finally
            {
                // Clean up buffer allocated by system
                if (IntPtr.Zero != pBuffer)
                {
                    NetApiBufferFree(pBuffer);
                }
            }
            return shareInfoList;
        }