FileInfoAccess

    /// <summary>
    /// Wrapper class which simplifies the access to file information.
    /// </summary>
    [Serializable]
    public sealed class FileInfoAccess : FileSystemInfoAccess<FileInfo>, IFileInfoAccess
    {
        /// <summary>
        /// The directory info.
        /// </summary>
        private readonly IDirectoryInfoAccess directoryInfo;
 
        /// <summary>
        /// Initializes a new instance of the <see cref="FileInfoAccess"/> class.
        /// </summary>
        /// <param name="fileInfo">The file info.</param>
        public FileInfoAccess(FileInfo fileInfo)
            : base(fileInfo)
        {
            this.directoryInfo = new DirectoryInfoAccess(fileInfo.Directory);
        }
 
        /// <summary>
        /// Initializes a new instance of the <see cref="FileInfoAccess"/> class.
        /// </summary>
        /// <param name="info">The serialization info.</param>
        /// <param name="context">The streaming context.</param>
        private FileInfoAccess(SerializationInfo info, StreamingContext context)
            : base(info, context)
        {
        }
 
        /// <summary>
        /// Gets an instance of the parent directory.
        /// </summary>
        /// <value>
        /// A <see cref="IDirectoryInfoAccess"/> object representing the parent directory
        /// of this file.
        /// </value>
        /// <exception cref="DirectoryNotFoundException">The specified path is invalid,
        /// such as being on an unmapped drive.</exception>
        /// <exception cref="SecurityException">The caller does not have the required
        /// permission.</exception>
        public IDirectoryInfoAccess Directory
        {
            get { return this.directoryInfo; }
        }
 
        /// <summary>
        /// Gets a string representing the directory's full path.
        /// </summary>
        /// <value>A string representing the directory's full path.</value>
        /// <exception cref="SecurityException">The caller does not have the required permission.</exception>
        /// <exception cref="ArgumentNullException">null was passed in for the directory name.</exception>
        public string DirectoryName
        {
            get { return this.FileSystemInfo.DirectoryName; }
        }
 
        /// <summary>
        /// Gets or sets a value indicating whether the current file is read only.
        /// </summary>
        /// <value>
        /// true if the current file is read only; otherwise, false.
        /// </value>
        /// <exception cref="FileNotFoundException">The file described by the current 
        /// <see cref="IFileInfoAccess"/> object could not be found</exception>
        /// <exception cref="IOException">An I/O error occurred while opening the file.
        /// </exception>
        /// <exception cref="UnauthorizedAccessException">The file described by the current
        /// <see cref="IFileInfoAccess"/> object is read-only.  -or- This operation is not
        /// supported on the current platform.  -or- The caller does not have the required
        /// permission.</exception>
        public bool IsReadOnly
        {
            get { return this.FileSystemInfo.IsReadOnly; }
            set { this.FileSystemInfo.IsReadOnly = value; }
        }
 
        /// <summary>
        /// Gets the size, in bytes, of the current file.
        /// </summary>
        /// <value>The size of the current file in bytes.</value>
        /// <exception cref="IOException"><see cref="IFileSystemInfoAccess.Refresh"/> cannot update the state of the file or directory.</exception>
        /// <exception cref="FileNotFoundException">The file does not exist. -or- The Length property is called for a directory.</exception>
        public long Length
        {
            get { return this.FileSystemInfo.Length; }
        }
 
        /// <summary>
        /// Populates a <see cref="T:System.Runtime.Serialization.SerializationInfo"/> with
        /// the data needed to serialize the target object.
        /// </summary>
        /// <param name="info">The
        /// <see cref="T:System.Runtime.Serialization.SerializationInfo"/> to populate with
        /// data.</param>
        /// <param name="context">The destination (see
        /// <see cref="T:System.Runtime.Serialization.StreamingContext"/>) for this
        /// serialization.</param>
        /// <exception cref="T:System.Security.SecurityException">The caller does
        /// not have the required permission.
        /// </exception>
        [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter)]
        public override void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            base.GetObjectData(info, context);
        }
    }