Use the BinarySearch() method to search stringArray for 'abc345' : Array Search « Data Structure « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Data Structure
3. Array Search

using System;

class MainClass
{

  public static void Main()
  {
    string[] stringArray = {"t", "i", "a", "test", "abc123", "abc345"};
    Array.Sort(stringArray);
        
    int index = Array.BinarySearch(stringArray, "abc345");
    Console.WriteLine("Array.BinarySearch(stringArray, \"abc345\") = " + index);

  }

}

Array.BinarySearch(stringArray, "abc345") = 2