using System;

public class Program

{

    public static void Main()

    {

        var s1 = "á"; // Unicode Character “á” (U+00E1)

        var s2 = "á"; // Unicode Character “a” (U+0061)

​

        Console.WriteLine(s1.Equals(s2, StringComparison.Ordinal)); //false

        Console.WriteLine(s1.Equals(s2, StringComparison.CurrentCulture));  //true

        Console.WriteLine(s1.Equals(s2, StringComparison.InvariantCulture));  //true

    }

}