  We numerically study the finite-size droplet condensation-evaporation
transition in two dimensions. We consider and compare two orthogonal
approaches, namely at fixed temperature and at fixed density, making use of
parallel multicanonical simulations. The equivalence between Ising model and
lattice gas allows us to compare to analytical predictions. We recover the
known background density (at fixed temperature) and transition temperature (at
fixed density) in the thermodynamic limit and compare our finite-size
deviations to the predicted leading-order finite-size corrections.
