private static void On(SeekCommand command)
{
fileSystem.Seek(command.FileHandle, command.Position);
WriteSuccessLine(string.Format("current position is {0}", command.Position));
}
public override bool TryBuildCommand(string[] args, out object command)
{
var sk = (command = new SeekCommand()) as SeekCommand;
return RequireFileHandle(args, 0, out sk.FileHandle)
&& RequirePosition(args, 1, out sk.Position);
}