using System;
using System.Globalization;
using System.Linq;
using System.Collections.Generic;
public class Test
{
public static void Main()
{
String[] someArray = { "Test1", "test2", "test3", "TEST4" };
string toCheck = "TEST123";
if (someArray.Any(str => toCheck.IndexOf(str, StringComparison.OrdinalIgnoreCase) > -1))
{
Console.Write("Contains!");
}
else
{
Console.Write("Does not contain!");
}
}
}
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