C# String CompareTo()

public int CompareTo(String str)
public int CompareTo(Object)

using System;  
    public class StringExample  
    {  
        public static void Main(string[] args)  
        {  
            string s1 = "hello";  
            string s2 = "hello";  
            string s3 = "csharp";
            Console.WriteLine(s1.CompareTo(s2)); 
            Console.WriteLine(s2.CompareTo(s3)); 
        }  
    }  

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