If you're used to C or C++ and not C#, you'd expect the compiler to whinge about the casual mixing of incompatible types but C# is more like some scripting languages (eg PHP) in this regard. C# is actually strictly typed but is happy to compile and run this (and outputs a= David 45.60) because all objects, including number literals and types include a ToString() method. So concat works fine!

Continuing the C# oddities as I've just finished the next C# Tutorial on strings. Is there any difference between the two string variables s1 and s2 in the code below? Is the comparison true or false?

using System;
using System.Text;

namespace ex1
{
    class Program
    {
        static void Main(string[] args)
        {
        string s1 = "".PadRight(60) + '*';
        string s2 = String.Empty.PadRight(60) + '*';
        if (s1 == s2)
          Console.WriteLine("They're the same!") ;
        else
          Console.WriteLine("They're not the same!") ;
        Console.ReadKey() ;
        }
    }
}


• Link to C# Tutorials
• Link to Compilers and Interpreters Article