/// <summary>
/// Reads data from the specified URL and port.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="port">The port.</param>
/// <param name="command">The command.</param>
/// <returns></returns>
/// <exception cref="System.NotImplementedException"></exception>
public string Read(string url, int port, string command)
{
var result = FileStore.Read(url, command);
if (string.IsNullOrEmpty(result))
{
result = Actual.Read(url, port, command);
FileStore.Write(url, command, result);
}
return(result);
}