/// <summary>
/// Compares file to another on name, size, last write time, attributes and hash of the contents.
/// </summary>
/// <param name="file">Comparison file.</param>
/// <returns> <code>true</code> if files are identical, <code>false</code> otherise. </returns>
/// <remarks>
/// This method does not compare actual file contents but rather it compares the hash values of the contents using SHA1 algorithm.
/// </remarks>
public override bool IsIdenticalTo(IFileSystemInfo file)
{
if (file == null)
{
throw new ArgumentNullException("file", "File is null.");
}
IFileInfo fileInfo = file as IFileInfo;
if (fileInfo == null)
{
return(false);
}
if (!base.IsIdenticalTo(file) ||
Length != fileInfo.Length ||
this.ComputeSHA1() != fileInfo.ComputeSHA1())
{
return(false);
}
return(true);
}