programming-examples/c-sharp/Strings/C# Sharp program to compare two strings in following three different ways produce three different results.cs

using System;
using System.Globalization;

public class Example28
{
    public static void Main()
    {
        string str1 = "sister";
        string str2 = "Sister";
        string relation;
        int result;
        // Cultural (linguistic) comparison.
        result = String.Compare(str1, str2, new CultureInfo("en-US"),
                                CompareOptions.None);
        if (result > 0)
            relation = "comes after";
        else if (result == 0)
            relation = "is the same as";
        else
            relation = "comes before";
        Console.WriteLine("'{0}' {1} '{2}'.",
                          str1, relation, str2);
        // Cultural (linguistic) case-insensitive comparison.
        result = String.Compare(str1, str2, new CultureInfo("en-US"),
                                CompareOptions.IgnoreCase);
        if (result > 0)
            relation = "comes after";
        else if (result == 0)
            relation = "is the same as";
        else
            relation = "comes before";
        Console.WriteLine("'{0}' {1} '{2}'.",
                          str1, relation, str2);
        // Culture-insensitive ordinal comparison.
        result = String.CompareOrdinal(str1, str2);
        if (result > 0)
            relation = "comes after";
        else if (result == 0)
            relation = "is the same as";
        else
            relation = "comes before";
        Console.WriteLine("'{0}' {1} '{2}'.",
                          str1, relation, str2);
    }
}