mcs/class/corlib/System.IO/File.cs

   1 //
   2 // System.IO.File.cs
   3 //
   4 //
   5 // Authors:
   6 //   Miguel de Icaza (miguel@ximian.com)
   7 //   Jim Richardson  (develop@wtfo-guru.com)
   8 //   Dan Lewis       (dihlewis@yahoo.co.uk)
   9 //   Ville Palo      (vi64pa@kolumbus.fi)
  10 //
  11 // Copyright 2002 Ximian, Inc. http://www.ximian.com
  12 // Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
  13 // Copyright (C) 2004, 2006, 2010 Novell, Inc (http://www.novell.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System;
  36 using System.Collections.Generic;
  37 using System.Diagnostics;
  38 using System.Security;
  39 using System.Text;
  40 using System.Runtime.InteropServices;
  41
  42 #if !NET_2_1
  43 using System.Security.AccessControl;
  44 #endif
  45
  46 namespace System.IO
  47 {
  48         [ComVisible (true)]
  49         public static class File
  50         {
  51                 public static void AppendAllText (string path, string contents)
  52                 {
  53                         using (TextWriter w = new StreamWriter (path, true)) {
  54                                 w.Write (contents);
  55                         }
  56                 }
  57
  58                 public static void AppendAllText (string path, string contents, Encoding encoding)
  59                 {
  60                         using (TextWriter w = new StreamWriter (path, true, encoding)) {
  61                                 w.Write (contents);
  62                         }
  63                 }
  64
  65                 public static StreamWriter AppendText (string path)
  66                 {
  67                         return new StreamWriter (path, true);
  68                 }
  69
  70                 public static void Copy (string sourceFileName, string destFileName)
  71                 {
  72                         Copy (sourceFileName, destFileName, false);
  73                 }
  74
  75                 public static void Copy (string sourceFileName, string destFileName, bool overwrite)
  76                 {
  77                         MonoIOError error;
  78
  79                         if (sourceFileName == null)
  80                                 throw new ArgumentNullException ("sourceFileName");
  81                         if (destFileName == null)
  82                                 throw new ArgumentNullException ("destFileName");
  83                         if (sourceFileName.Length == 0)
  84                                 throw new ArgumentException ("An empty file name is not valid.", "sourceFileName");
  85                         if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
  86                                 throw new ArgumentException ("The file name is not valid.");
  87                         if (destFileName.Length == 0)
  88                                 throw new ArgumentException ("An empty file name is not valid.", "destFileName");
  89                         if (destFileName.Trim ().Length == 0 || destFileName.IndexOfAny (Path.InvalidPathChars) != -1)
  90                                 throw new ArgumentException ("The file name is not valid.");
  91
  92                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
  93
  94                         if (!MonoIO.Exists (sourceFileName, out error))
  95                                 throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName), sourceFileName);
  96                         if ((GetAttributes (sourceFileName) & FileAttributes.Directory) == FileAttributes.Directory)
  97                                 throw new ArgumentException (Locale.GetText ("{0} is a directory", sourceFileName));
  98
  99                         if (MonoIO.Exists (destFileName, out error)) {
 100                                 if ((GetAttributes (destFileName) & FileAttributes.Directory) == FileAttributes.Directory)
 101                                         throw new ArgumentException (Locale.GetText ("{0} is a directory", destFileName));
 102                                 if (!overwrite)
 103                                         throw new IOException (Locale.GetText ("{0} already exists", destFileName));
 104                         }
 105
 106                         string DirName = Path.GetDirectoryName (destFileName);
 107                         if (DirName != String.Empty && !Directory.Exists (DirName))
 108                                 throw new DirectoryNotFoundException (Locale.GetText ("Destination directory not found: {0}",DirName));
 109
 110                         if (!MonoIO.CopyFile (sourceFileName, destFileName, overwrite, out error)) {
 111                                 string p = Locale.GetText ("{0}\" or \"{1}", sourceFileName, destFileName);
 112                                 throw MonoIO.GetException (p, error);
 113                         }
 114                 }
 115
 116                 internal static String InternalCopy (String sourceFileName, String destFileName, bool overwrite, bool checkHost)
 117                 {
 118                         String fullSourceFileName = Path.GetFullPathInternal(sourceFileName);
 119                         String fullDestFileName = Path.GetFullPathInternal(destFileName);
 120
 121                         MonoIOError error;
 122
 123                         if (!MonoIO.CopyFile (fullSourceFileName, fullDestFileName, overwrite, out error)) {
 124                                 string p = Locale.GetText ("{0}\" or \"{1}", sourceFileName, destFileName);
 125                                 throw MonoIO.GetException (p, error);
 126                         }
 127
 128                         return fullDestFileName;
 129                 }
 130
 131                 public static FileStream Create (string path)
 132                 {
 133                         return Create (path, 8192);
 134                 }
 135
 136                 public static FileStream Create (string path, int bufferSize)
 137                 {
 138                         return new FileStream (path, FileMode.Create, FileAccess.ReadWrite,
 139                                 FileShare.None, bufferSize);
 140                 }
 141
 142 #if !NET_2_1
 143                 [MonoLimitation ("FileOptions are ignored")]
 144                 public static FileStream Create (string path, int bufferSize,
 145                                                  FileOptions options)
 146                 {
 147                         return Create (path, bufferSize, options, null);
 148                 }
 149
 150                 [MonoLimitation ("FileOptions and FileSecurity are ignored")]
 151                 public static FileStream Create (string path, int bufferSize,
 152                                                  FileOptions options,
 153                                                  FileSecurity fileSecurity)
 154                 {
 155                         return new FileStream (path, FileMode.Create, FileAccess.ReadWrite,
 156                                 FileShare.None, bufferSize, options);
 157                 }
 158 #endif
 159
 160                 public static StreamWriter CreateText (string path)
 161                 {
 162                         return new StreamWriter (path, false);
 163                 }
 164
 165                 public static void Delete (string path)
 166                 {
 167                         Path.Validate (path);
 168                         if (Directory.Exists (path))
 169                                 throw new UnauthorizedAccessException(Locale.GetText ("{0} is a directory", path));
 170
 171                         string DirName = Path.GetDirectoryName(path);
 172                         if (DirName != String.Empty && !Directory.Exists (DirName))
 173                                 throw new DirectoryNotFoundException (Locale.GetText ("Could not find a part of the path \"{0}\".", path));
 174
 175                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 176
 177                         MonoIOError error;
 178
 179                         if (!MonoIO.DeleteFile (path, out error)){
 180                                 if (error != MonoIOError.ERROR_FILE_NOT_FOUND)
 181                                         throw MonoIO.GetException (path, error);
 182                         }
 183                 }
 184
 185                 public static bool Exists (string path)
 186                 {
 187                         // For security reasons no exceptions are
 188                         // thrown, only false is returned if there is
 189                         // any problem with the path or permissions.
 190                         // Minimizes what information can be
 191                         // discovered by using this method.
 192                         if (String.IsNullOrWhiteSpace (path) || path.IndexOfAny(Path.InvalidPathChars) >= 0)
 193                                 return false;
 194
 195                         // on Moonlight this does not throw but returns false
 196                         if (!SecurityManager.CheckElevatedPermissions ())
 197                                 return false;
 198
 199                         MonoIOError error;
 200                         return MonoIO.ExistsFile (path, out error);
 201                 }
 202
 203 #if !NET_2_1
 204                 public static FileSecurity GetAccessControl (string path)
 205                 {
 206                         // AccessControlSections.Audit requires special permissions.
 207                         return GetAccessControl (path,
 208                                                  AccessControlSections.Owner |
 209                                                  AccessControlSections.Group |
 210                                                  AccessControlSections.Access);
 211                 }
 212
 213                 public static FileSecurity GetAccessControl (string path, AccessControlSections includeSections)
 214                 {
 215                         return new FileSecurity (path, includeSections);
 216                 }
 217 #endif
 218
 219                 public static FileAttributes GetAttributes (string path)
 220                 {
 221                         Path.Validate (path);
 222                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 223
 224                         MonoIOError error;
 225                         FileAttributes attrs;
 226
 227                         attrs = MonoIO.GetFileAttributes (path, out error);
 228                         if (error != MonoIOError.ERROR_SUCCESS)
 229                                 throw MonoIO.GetException (path, error);
 230                         return attrs;
 231                 }
 232
 233                 public static DateTime GetCreationTime (string path)
 234                 {
 235                         MonoIOStat stat;
 236                         MonoIOError error;
 237                         Path.Validate (path);
 238                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 239
 240                         if (!MonoIO.GetFileStat (path, out stat, out error)) {
 241                                 if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
 242                                         return DefaultLocalFileTime;
 243                                 else
 244                                         throw new IOException (path);
 245                         }
 246                         return DateTime.FromFileTime (stat.CreationTime);
 247                 }
 248
 249                 public static DateTime GetCreationTimeUtc (string path)
 250                 {
 251                         return GetCreationTime (path).ToUniversalTime ();
 252                 }
 253
 254                 public static DateTime GetLastAccessTime (string path)
 255                 {
 256                         MonoIOStat stat;
 257                         MonoIOError error;
 258                         Path.Validate (path);
 259                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 260
 261                         if (!MonoIO.GetFileStat (path, out stat, out error)) {
 262                                 if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
 263                                         return DefaultLocalFileTime;
 264                                 else
 265                                         throw new IOException (path);
 266                         }
 267                         return DateTime.FromFileTime (stat.LastAccessTime);
 268                 }
 269
 270                 public static DateTime GetLastAccessTimeUtc (string path)
 271                 {
 272                         return GetLastAccessTime (path).ToUniversalTime ();
 273                 }
 274
 275                 public static DateTime GetLastWriteTime (string path)
 276                 {
 277                         MonoIOStat stat;
 278                         MonoIOError error;
 279                         Path.Validate (path);
 280                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 281
 282                         if (!MonoIO.GetFileStat (path, out stat, out error)) {
 283                                 if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
 284                                         return DefaultLocalFileTime;
 285                                 else
 286                                         throw new IOException (path);
 287                         }
 288                         return DateTime.FromFileTime (stat.LastWriteTime);
 289                 }
 290
 291                 public static DateTime GetLastWriteTimeUtc (string path)
 292                 {
 293                         return GetLastWriteTime (path).ToUniversalTime ();
 294                 }
 295
 296                 public static void Move (string sourceFileName, string destFileName)
 297                 {
 298                         if (sourceFileName == null)
 299                                 throw new ArgumentNullException ("sourceFileName");
 300                         if (destFileName == null)
 301                                 throw new ArgumentNullException ("destFileName");
 302                         if (sourceFileName.Length == 0)
 303                                 throw new ArgumentException ("An empty file name is not valid.", "sourceFileName");
 304                         if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 305                                 throw new ArgumentException ("The file name is not valid.");
 306                         if (destFileName.Length == 0)
 307                                 throw new ArgumentException ("An empty file name is not valid.", "destFileName");
 308                         if (destFileName.Trim ().Length == 0 || destFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 309                                 throw new ArgumentException ("The file name is not valid.");
 310
 311                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 312
 313                         MonoIOError error;
 314                         if (!MonoIO.Exists (sourceFileName, out error))
 315                                 throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName), sourceFileName);
 316
 317                         // Don't check for this error here to allow the runtime
 318                         // to check if sourceFileName and destFileName are equal.
 319                         // Comparing sourceFileName and destFileName is not enough.
 320                         //if (MonoIO.Exists (destFileName, out error))
 321                         //      throw new IOException (Locale.GetText ("{0} already exists", destFileName));
 322
 323                         string DirName;
 324                         DirName = Path.GetDirectoryName (destFileName);
 325                         if (DirName != String.Empty && !Directory.Exists (DirName))
 326                                 throw new DirectoryNotFoundException (Locale.GetText ("Could not find a part of the path."));
 327
 328                         if (!MonoIO.MoveFile (sourceFileName, destFileName, out error)) {
 329                                 if (error == MonoIOError.ERROR_ALREADY_EXISTS)
 330                                         throw MonoIO.GetException (error);
 331                                 else if (error == MonoIOError.ERROR_SHARING_VIOLATION)
 332                                         throw MonoIO.GetException (sourceFileName, error);
 333
 334                                 throw MonoIO.GetException (error);
 335                         }
 336                 }
 337
 338                 public static FileStream Open (string path, FileMode mode)
 339                 {
 340                         return new FileStream (path, mode, mode == FileMode.Append ? FileAccess.Write : FileAccess.ReadWrite, FileShare.None);
 341                 }
 342
 343                 public static FileStream Open (string path, FileMode mode, FileAccess access)
 344                 {
 345                         return new FileStream (path, mode, access, FileShare.None);
 346                 }
 347
 348                 public static FileStream Open (string path, FileMode mode, FileAccess access,
 349                                                FileShare share)
 350                 {
 351                         return new FileStream (path, mode, access, share);
 352                 }
 353
 354                 public static FileStream OpenRead (string path)
 355                 {
 356                         return new FileStream (path, FileMode.Open, FileAccess.Read, FileShare.Read);
 357                 }
 358
 359                 public static StreamReader OpenText (string path)
 360                 {
 361                         return new StreamReader (path);
 362                 }
 363
 364                 public static FileStream OpenWrite (string path)
 365                 {
 366                         return new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
 367                 }
 368
 369                 public static void Replace (string sourceFileName,
 370                                             string destinationFileName,
 371                                             string destinationBackupFileName)
 372                 {
 373                         Replace (sourceFileName, destinationFileName, destinationBackupFileName, false);
 374                 }
 375
 376                 public static void Replace (string sourceFileName,
 377                                             string destinationFileName,
 378                                             string destinationBackupFileName,
 379                                             bool ignoreMetadataErrors)
 380                 {
 381                         MonoIOError error;
 382
 383                         if (sourceFileName == null)
 384                                 throw new ArgumentNullException ("sourceFileName");
 385                         if (destinationFileName == null)
 386                                 throw new ArgumentNullException ("destinationFileName");
 387                         if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 388                                 throw new ArgumentException ("sourceFileName");
 389                         if (destinationFileName.Trim ().Length == 0 || destinationFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 390                                 throw new ArgumentException ("destinationFileName");
 391
 392                         string fullSource = Path.GetFullPath (sourceFileName);
 393                         string fullDest = Path.GetFullPath (destinationFileName);
 394                         if (MonoIO.ExistsDirectory (fullSource, out error))
 395                                 throw new IOException (Locale.GetText ("{0} is a directory", sourceFileName));
 396                         if (MonoIO.ExistsDirectory (fullDest, out error))
 397                                 throw new IOException (Locale.GetText ("{0} is a directory", destinationFileName));
 398
 399                         if (!Exists (fullSource))
 400                                 throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName),
 401                                                                  sourceFileName);
 402                         if (!Exists (fullDest))
 403                                 throw new FileNotFoundException (Locale.GetText ("{0} does not exist", destinationFileName),
 404                                                                  destinationFileName);
 405                         if (fullSource == fullDest)
 406                                 throw new IOException (Locale.GetText ("Source and destination arguments are the same file."));
 407
 408                         string fullBackup = null;
 409                         if (destinationBackupFileName != null) {
 410                                 if (destinationBackupFileName.Trim ().Length == 0 ||
 411                                     destinationBackupFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 412                                         throw new ArgumentException ("destinationBackupFileName");
 413
 414                                 fullBackup = Path.GetFullPath (destinationBackupFileName);
 415                                 if (MonoIO.ExistsDirectory (fullBackup, out error))
 416                                         throw new IOException (Locale.GetText ("{0} is a directory", destinationBackupFileName));
 417                                 if (fullSource == fullBackup)
 418                                         throw new IOException (Locale.GetText ("Source and backup arguments are the same file."));
 419                                 if (fullDest == fullBackup)
 420                                         throw new IOException (Locale.GetText (
 421                                                                "Destination and backup arguments are the same file."));
 422                         }
 423
 424                         var attrs = GetAttributes (fullDest);
 425
 426                         // TODO: Should be done in wapi, win32 api handles this already
 427                         if ((attrs & FileAttributes.ReadOnly) != 0)
 428                                 throw MonoIO.GetException (MonoIOError.ERROR_ACCESS_DENIED);
 429
 430                         if (!MonoIO.ReplaceFile (fullSource, fullDest, fullBackup,
 431                                                  ignoreMetadataErrors, out error)) {
 432                                 throw MonoIO.GetException (error);
 433                         }
 434                 }
 435
 436 #if !NET_2_1
 437                 public static void SetAccessControl (string path,
 438                                                      FileSecurity fileSecurity)
 439                 {
 440                         if (null == fileSecurity)
 441                                 throw new ArgumentNullException ("fileSecurity");
 442
 443                         fileSecurity.PersistModifications (path);
 444                 }
 445 #endif
 446
 447                 public static void SetAttributes (string path,
 448                                                   FileAttributes fileAttributes)
 449                 {
 450                         MonoIOError error;
 451                         Path.Validate (path);
 452
 453                         if (!MonoIO.SetFileAttributes (path, fileAttributes, out error))
 454                                 throw MonoIO.GetException (path, error);
 455                 }
 456
 457                 public static void SetCreationTime (string path, DateTime creationTime)
 458                 {
 459                         MonoIOError error;
 460                         Path.Validate (path);
 461                         if (!MonoIO.Exists (path, out error))
 462                                 throw MonoIO.GetException (path, error);
 463                         if (!MonoIO.SetCreationTime (path, creationTime, out error))
 464                                 throw MonoIO.GetException (path, error);
 465                 }
 466
 467                 public static void SetCreationTimeUtc (string path, DateTime creationTimeUtc)
 468                 {
 469                         SetCreationTime (path, creationTimeUtc.ToLocalTime ());
 470                 }
 471
 472                 public static void SetLastAccessTime (string path, DateTime lastAccessTime)
 473                 {
 474                         MonoIOError error;
 475                         Path.Validate (path);
 476                         if (!MonoIO.Exists (path, out error))
 477                                 throw MonoIO.GetException (path, error);
 478                         if (!MonoIO.SetLastAccessTime (path, lastAccessTime, out error))
 479                                 throw MonoIO.GetException (path, error);
 480                 }
 481
 482                 public static void SetLastAccessTimeUtc (string path, DateTime lastAccessTimeUtc)
 483                 {
 484                         SetLastAccessTime (path, lastAccessTimeUtc.ToLocalTime ());
 485                 }
 486
 487                 public static void SetLastWriteTime (string path,
 488                                                      DateTime lastWriteTime)
 489                 {
 490                         MonoIOError error;
 491                         Path.Validate (path);
 492                         if (!MonoIO.Exists (path, out error))
 493                                 throw MonoIO.GetException (path, error);
 494                         if (!MonoIO.SetLastWriteTime (path, lastWriteTime, out error))
 495                                 throw MonoIO.GetException (path, error);
 496                 }
 497
 498                 public static void SetLastWriteTimeUtc (string path,
 499                                                      DateTime lastWriteTimeUtc)
 500                 {
 501                         SetLastWriteTime (path, lastWriteTimeUtc.ToLocalTime ());
 502                 }
 503
 504                 //
 505                 // The documentation for this method is most likely wrong, it
 506                 // talks about doing a "binary read", but the remarks say
 507                 // that this "detects the encoding".
 508                 //
 509                 // This can not detect and do anything useful with the encoding
 510                 // since the result is a byte [] not a char [].
 511                 //
 512                 public static byte [] ReadAllBytes (string path)
 513                 {
 514                         using (FileStream s = OpenRead (path)) {
 515                                 long size = s.Length;
 516                                 // limited to 2GB according to http://msdn.microsoft.com/en-us/library/system.io.file.readallbytes.aspx
 517                                 if (size > Int32.MaxValue)
 518                                         throw new IOException ("Reading more than 2GB with this call is not supported");
 519
 520                                 int pos = 0;
 521                                 int count = (int) size;
 522                                 byte [] result = new byte [size];
 523                                 while (count > 0) {
 524                                         int n = s.Read (result, pos, count);
 525                                         if (n == 0)
 526                                                 throw new IOException ("Unexpected end of stream");
 527                                         pos += n;
 528                                         count -= n;
 529                                 }
 530                                 return result;
 531                         }
 532                 }
 533
 534                 public static string [] ReadAllLines (string path)
 535                 {
 536                         using (StreamReader reader = File.OpenText (path)) {
 537                                 return ReadAllLines (reader);
 538                         }
 539                 }
 540
 541                 public static string [] ReadAllLines (string path, Encoding encoding)
 542                 {
 543                         using (StreamReader reader = new StreamReader (path, encoding)) {
 544                                 return ReadAllLines (reader);
 545                         }
 546                 }
 547
 548                 static string [] ReadAllLines (StreamReader reader)
 549                 {
 550                         List<string> list = new List<string> ();
 551                         while (!reader.EndOfStream)
 552                                 list.Add (reader.ReadLine ());
 553                         return list.ToArray ();
 554                 }
 555
 556                 public static string ReadAllText (string path)
 557                 {
 558                         using (StreamReader sr = new StreamReader (path)) {
 559                                 return sr.ReadToEnd ();
 560                         }
 561                 }
 562
 563                 public static string ReadAllText (string path, Encoding encoding)
 564                 {
 565                         using (StreamReader sr = new StreamReader (path, encoding)) {
 566                                 return sr.ReadToEnd ();
 567                         }
 568                 }
 569
 570                 public static void WriteAllBytes (string path, byte [] bytes)
 571                 {
 572                         using (Stream stream = File.Create (path)) {
 573                                 stream.Write (bytes, 0, bytes.Length);
 574                         }
 575                 }
 576
 577                 public static void WriteAllLines (string path, string [] contents)
 578                 {
 579                         using (StreamWriter writer = new StreamWriter (path)) {
 580                                 WriteAllLines (writer, contents);
 581                         }
 582                 }
 583
 584                 public static void WriteAllLines (string path, string [] contents, Encoding encoding)
 585                 {
 586                         using (StreamWriter writer = new StreamWriter (path, false, encoding)) {
 587                                 WriteAllLines (writer, contents);
 588                         }
 589                 }
 590
 591                 static void WriteAllLines (StreamWriter writer, string [] contents)
 592                 {
 593                         foreach (string line in contents)
 594                                 writer.WriteLine (line);
 595                 }
 596
 597                 public static void WriteAllText (string path, string contents)
 598                 {
 599                         WriteAllText (path, contents, EncodingHelper.UTF8Unmarked);
 600                 }
 601
 602                 public static void WriteAllText (string path, string contents, Encoding encoding)
 603                 {
 604                         using (StreamWriter sw = new StreamWriter (path, false, encoding)) {
 605                                 sw.Write (contents);
 606                         }
 607                 }
 608
 609                 static DateTime? defaultLocalFileTime;
 610                 static DateTime DefaultLocalFileTime {
 611                         get {
 612                                 if (defaultLocalFileTime == null)
 613                                         defaultLocalFileTime = new DateTime (1601, 1, 1).ToLocalTime ();
 614
 615                                 return defaultLocalFileTime.Value;
 616                         }
 617                 }
 618
 619
 620                 [MonoLimitation ("File encryption isn't supported (even on NTFS).")]
 621                 public static void Encrypt (string path)
 622                 {
 623                         // MS.NET support this only on NTFS file systems, i.e. it's a file-system (not a framework) feature.
 624                         // otherwise it throws a NotSupportedException (or a PlatformNotSupportedException on older OS).
 625                         // we throw the same (instead of a NotImplementedException) because most code should already be
 626                         // handling this exception to work properly.
 627                         throw new NotSupportedException (Locale.GetText ("File encryption isn't supported on any file system."));
 628                 }
 629
 630                 [MonoLimitation ("File encryption isn't supported (even on NTFS).")]
 631                 public static void Decrypt (string path)
 632                 {
 633                         // MS.NET support this only on NTFS file systems, i.e. it's a file-system (not a framework) feature.
 634                         // otherwise it throws a NotSupportedException (or a PlatformNotSupportedException on older OS).
 635                         // we throw the same (instead of a NotImplementedException) because most code should already be
 636                         // handling this exception to work properly.
 637                         throw new NotSupportedException (Locale.GetText ("File encryption isn't supported on any file system."));
 638                 }
 639
 640                 public static IEnumerable<string> ReadLines (string path)
 641                 {
 642                         return ReadLines (File.OpenText (path));
 643                 }
 644
 645                 public static IEnumerable<string> ReadLines (string path, Encoding encoding)
 646                 {
 647                         return ReadLines (new StreamReader (path, encoding));
 648                 }
 649
 650                 // refactored in order to avoid compiler-generated names for Moonlight tools
 651                 static IEnumerable<string> ReadLines (StreamReader reader)
 652                 {
 653                         using (reader) {
 654                                 string s;
 655                                 while ((s = reader.ReadLine ()) != null) {
 656                                         yield return s;
 657                                 }
 658                         }
 659                 }
 660
 661                 public static void AppendAllLines (string path, IEnumerable<string> contents)
 662                 {
 663                         Path.Validate (path);
 664
 665                         if (contents == null)
 666                                 return;
 667
 668                         using (TextWriter w = new StreamWriter (path, true)) {
 669                                 foreach (var line in contents)
 670                                         w.WriteLine (line);
 671                         }
 672                 }
 673
 674                 public static void AppendAllLines (string path, IEnumerable<string> contents, Encoding encoding)
 675                 {
 676                         Path.Validate (path);
 677
 678                         if (contents == null)
 679                                 return;
 680
 681                         using (TextWriter w = new StreamWriter (path, true, encoding)) {
 682                                 foreach (var line in contents)
 683                                         w.WriteLine (line);
 684                         }
 685                 }
 686
 687                 public static void WriteAllLines (string path, IEnumerable<string> contents)
 688                 {
 689                         Path.Validate (path);
 690
 691                         if (contents == null)
 692                                 return;
 693
 694                         using (TextWriter w = new StreamWriter (path, false)) {
 695                                 foreach (var line in contents)
 696                                         w.WriteLine (line);
 697                         }
 698                 }
 699
 700                 public static void WriteAllLines (string path, IEnumerable<string> contents, Encoding encoding)
 701                 {
 702                         Path.Validate (path);
 703
 704                         if (contents == null)
 705                                 return;
 706
 707                         using (TextWriter w = new StreamWriter (path, false, encoding)) {
 708                                 foreach (var line in contents)
 709                                         w.WriteLine (line);
 710                         }
 711                 }
 712
 713                 internal static int FillAttributeInfo (String path, ref MonoIOStat data, bool tryagain, bool returnErrorOnNotFound)
 714                 {
 715                         if (tryagain)
 716                                 throw new NotImplementedException ();
 717
 718                         MonoIOError error;
 719                         MonoIO.GetFileStat (path, out data, out error);
 720
 721                         if (!returnErrorOnNotFound && (error == MonoIOError.ERROR_FILE_NOT_FOUND || error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_NOT_READY)) {
 722                                 data = default (MonoIOStat);
 723                                 data.fileAttributes = (FileAttributes) (-1);
 724                                 return 0;
 725                         }
 726
 727                         return (int) error;
 728                 }
 729         }
 730 }