//Visual Basic 2008/2010 Binair Zoeken in Arrays Arrays
public class ExerciseSolution {
    void Main() {
        int count = 3;
        string[] names;
        int[] zipCodes;
        Console.WriteLine("Zip Code ?");
        string zipCode = Console.ReadLine();
        bool found;
        bool exhausted;
        int lowerbound;
        int index;
        int upperbound = (count - 1);
        for (; (found || exhausted); ) {
            index = ((lowerbound + upperbound) 
                        / 2);
            found = (zipCode == this.zipCodes(index));
            exhausted = (upperbound <= lowerbound);
            if (((found || exhausted) 
                        == false)) {
                if ((zipCode > this.zipCodes(index))) {
                    lowerbound = (index + 1);
                }
                else {
                    upperbound = (index - 1);
                }
            }
        }
        if (found) {
            Console.WriteLine(this.names(index));
        }
        else {
            Console.WriteLine("City not found.");
        }
        Console.ReadLine();
    }
}
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