One or more types required to compile a dynamic expression cannot be found. Are you missing references to Microsoft.CSharp.dll and System.Core.dll?

I am trying to compile this code in Microsoft Visual C# 2010

using System;
using System.Globalization;


class main
{
    static void Main()
    {

        dynamic d;
        d = "dyna";
        Console.WriteLine(d);    
    }
}

but I am getting these two errors

Error 1 Predefined type ‘Microsoft.CSharp.RuntimeBinder.Binder’ is not defined or imported

Error 2 One or more types required to compile a dynamic expression cannot be found. Are you missing references to Microsoft.CSharp.dll and System.Core.dll?

I read this other post but I am new to C# and I couldn’t understand what really is the problem. Especially what and where are these so called .config files..