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=={{header|C sharp|C#}}==

<lang csharp>using System;

using System.Collections.Generic;

class Program {

static void Main(string[] args) {

List<string> haystack = new List<string>() { "Zig", "Zag", "Wally", "Ronald", "Bush", "Krusty", "Charlie", "Bush", "Bozo" };

foreach (string needle in new string[] { "Washington", "Bush" }) {

int index = haystack.IndexOf(needle);

if (index < 0) Console.WriteLine("{0} is not in haystack",needle);

else Console.WriteLine("{0} {1}",index,needle);

}

}

}</lang>