  We present measurements of branching fractions and \CP-violating asymmetries
in decays of $B$ mesons to two-body final states containing a \Kz. The results
are based on a data sample of approximately 88 million \upsbb decays collected
with the \babar detector at the \pep2 asymmetric-energy $B$ Factory at SLAC. We
measure $\BR(\Bp\to\Kz\pip) = (22.3 \pm 1.7 \pm 1.1)\times 10^{-6}$,
$\BR(\Bz\to\Kz\piz) = (11.4\pm 1.7\pm 0.8)\times 10^{-6}$, $\BR(\Bp\to\Kzb\Kp)
< 2.5\times 10^{-6}$, and $\BR(\Bz\to\KzKzb) < 1.8\times 10^{-6}$, where the
first uncertainty is statistical and the second is systematic, and the upper
limits are at the 90% confidence level. In addition, the following
\CP-violating asymmetries have been measured: ${\cal A}_{CP}(\Bp\to\Kz\pip) =
-0.05 \pm 0.08 \pm 0.01$ and ${\cal A}_{CP}(\Bz\to\Kz\piz) = 0.03 \pm 0.36\pm
0.11$.
