Using 0:8 10 6 D D ÿ pairs collected with the CLEO-c detector at the 3770 resonance, we have searched for flavor-changing neutral current and lepton-number-violating decays of D mesons to final states with dielectrons. We find no indication of either, obtaining 90% confidence level upper limits of B D ! e e ÿ < 7:4 10 ÿ6 , B D ! ÿ e e < 3:6 10 ÿ6 , B D ! K e e ÿ < 6:2 10 ÿ6 , and B D ! K ÿ e e < 4:5 10 ÿ6 .
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