Sample for String.Equals(Object), String.Equals(String), String.Equals(String, String) : String Compare « String « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. String
3. String Compare

using System;
using System.Text;

class Sample {
    public static void Main() {
        StringBuilder sb = new StringBuilder("abcd");
        String      str1 = "abcd";
        String      str2 = null;
        Object    o2   = null;
    
        Console.WriteLine("String.Equals(Object). Object is a StringBuilder, not a String.");
        Console.WriteLine("Is str1 equal to sb?: {0}", str1.Equals(sb));
    
        Console.WriteLine("String.Equals(Object). Object is a String.");
        str2 = sb.ToString();
        o2   = str2;
        Console.WriteLine("The value of Object o2 is '{0}'.", o2);
        Console.WriteLine("Is str1 equal to o2?: {0}", str1.Equals(o2));
    
        Console.WriteLine("String.Equals(String)");
        Console.WriteLine("The value of String str2 is '{0}'.", str2);
        Console.WriteLine("Is str1 equal to str2?: {0}", str1.Equals(str2));
    
        Console.WriteLine("String.Equals(String, String)");
        Console.WriteLine("Is str1 equal to str2?: {0}", String.Equals(str1, str2));
    }
}