Constructor inheriterance, C#

Constructor inheriterance

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            new ClassBase(); //Chama proprio
            new ClassTeste1(); //Chama base
            new ClassTeste2(); //Chama base e chama proprio
            new ClassTeste3();
            //new ClassTeste3("oi");
            //new ClassTeste("teste"); nÃO COMPILA
        }
    }
    
    public class ClassBase
    {
        public ClassBase()
        {
            Console.WriteLine("ClassBase.ClassBase();");
        }
        
        public ClassBase(string tag)
        {
            Console.WriteLine("ClassBase.ClassBase({0});", tag);
        }
    }
    
    public class ClassTeste1: ClassBase
    {
    }
    
    public class ClassTeste2: ClassBase
    {
        public ClassTeste2()
        {
            Console.WriteLine("ClassBase.ClassTeste2();");
        }
    }
    
    public class ClassTeste3: ClassBase
    {
        public ClassTeste3(): base("3")
        {
            Console.WriteLine("ClassBase.ClassTeste3();");
        }
    }
    
}


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