// C# Extension Method
// Doc: https://csharp-extension.com/en/method/1002173/array-indexof
// @nuget: Z.ExtensionMethods
using System;
public class Program
{
public static void Main()
String[] strings = { "the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog", "in", "the", "barn" };
String searchString = "jumps";
// C# Extension Method: Array - IndexOf
int index = strings.IndexOf(searchString);
Console.WriteLine("The first occurrence of \"{0}\" is at index {1}.",
searchString, index);
}