Tip: How to remove read-only attribute of a file?

Below are the helper methods used to set or remove read-only attribute of a file. As well as I've provided a method to check the read-only attribute of a file.

       /// <summary>

       /// Sets the passed file as readonly.

       /// </summary>

       /// <param name="filePath">The fully qualified name of a file, or the relative file name.</param>

       public static void SetReadOnly(string filePath)

       {

          SetReadOnly(filePath, true);

       }

       /// <summary>

       /// Sets the passed file to either readonly or not.

       /// </summary>

       /// <param name="filePath">The fully qualified name of a file, or the relative file name.</param>

       /// <param name="readOnly">true to make the file as readonly; otherwise, false.</param>

       public static void SetReadOnly(string filePath, bool readOnly)

       {

          if (String.IsNullOrEmpty(filePath))

              throw new ArgumentNullException("FilePath");

          if (!File.Exists(filePath)) return;

          FileInfo myFile = new FileInfo(filePath);

          myFile.IsReadOnly = readOnly;

       }

       /// <summary>

       /// Gets a value that determines if the passed file is read only.

       /// </summary>

       /// <param name="filePath">The fully qualified name of a file, or the relative file name.</param>

       /// <returns>true if the current file is read only; otherwise, false.</returns>

       public static bool IsReadOnly(string filePath)

       {

          if (String.IsNullOrEmpty(filePath))

              throw new ArgumentNullException("FilePath");

          if (!File.Exists(filePath))

              throw new ArgumentException(String.Format("'{0}' file not exists.", filePath));

          FileInfo myFile = new FileInfo(filePath);

          return myFile.IsReadOnly;

       }