Array.BinarySearch
using System;
class MainClass
{
public static void Main()
{
int[] intArray = {5, 2, 3, 1, 6, 9, 7, 14, 25};
Array.Sort(intArray);
int index = Array.BinarySearch(intArray, 5);
Console.WriteLine("Array.BinarySearch(intArray, 5) = " + index);
}
}
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