InTheHand.Storage.PathIO.AppendLinesAsync C# (CSharp) Method

        public static Task AppendLinesAsync(string absolutePath, IEnumerable<string> lines)
        {
            return AppendLinesAsync(absolutePath, lines, UnicodeEncoding.Utf8);
        }

        /// <summary>
        /// Appends lines of text to the specified file using the specified character encoding.
        /// </summary>
        /// <param name="file">The file that the lines are appended to.</param>
        /// <param name="lines">The list of text strings to append as lines.</param>
        /// <param name="encoding">The character encoding of the file.</param>
        /// <returns>No object or value is returned when this method completes.</returns>
        public static Task AppendLinesAsync(IStorageFile file, IEnumerable <string> lines, UnicodeEncoding encoding)
        {
#if __ANDROID__ || __UNIFIED__ || WIN32 || TIZEN
            return(PathIO.AppendLinesAsync(file.Path, lines, encoding));
#elif WINDOWS_UWP || WINDOWS_APP || WINDOWS_PHONE_APP || WINDOWS_PHONE_81
            return(Windows.Storage.FileIO.AppendLinesAsync((Windows.Storage.StorageFile)((StorageFile)file), lines, (Windows.Storage.Streams.UnicodeEncoding)((int)encoding)).AsTask());
#elif WINDOWS_PHONE
            return(Task.Run(async() =>
            {
                Stream s = await file.OpenStreamForWriteAsync();
                s.Position = s.Length;

                using (StreamWriter sw = new StreamWriter(s, UnicodeEncodingHelper.EncodingFromUnicodeEncoding(encoding)))
                {
                    foreach (string line in lines)
                    {
                        sw.WriteLine(line);
                    }
                }
            }));
#else
            throw new PlatformNotSupportedException();
#endif
        }