Whether the method calls the method of the dynamic object basically GetMethod (). Invoke ()?

To add to the other answers, I did the following test (more specifically, how you structure your code):

public class XmlCodec<T>
{
    public List<string> MyList = new List<string>();

    public string GetCollectionName()
    {
        return "Some Collection Name";
    }

    public void ReadCollection(string collectionName)
    {
        for (int i = 0; i < 100; i++)
            MyList.Add(collectionName + i.ToString());
    }
}

class Program
{

    static void Main(string[] args)
    {
        Type xmlCodecType = typeof(XmlCodec<>).MakeGenericType(typeof(string));
        dynamic xmlCodec = Activator.CreateInstance(xmlCodecType);
        xmlCodec.ReadCollection(xmlCodec.GetCollectionName());

        Print(xmlCodec);
        Console.ReadKey(true);
    }

    public static void Print(dynamic obj)
    {
        foreach (string s in obj.MyList)
            Console.WriteLine(s);
    }

}

      

        
        
        
      

    

Now, in DotPeek, it looks like this (printing method omitted for brevity):

private static void Main(string[] args)
{
  object instance = Activator.CreateInstance(typeof (XmlCodec<>).MakeGenericType(typeof (string)));
  // ISSUE: reference to a compiler-generated field
  if (Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site1 == null)
  {
    // ISSUE: reference to a compiler-generated field
    Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site1 = CallSite<Action<CallSite, object, object>>.Create(Binder.InvokeMember(CSharpBinderFlags.ResultDiscarded, "ReadCollection", (IEnumerable<Type>) null, typeof (Program), (IEnumerable<CSharpArgumentInfo>) new CSharpArgumentInfo[2]
    {
      CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, (string) null),
      CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, (string) null)
    }));
  }
  // ISSUE: reference to a compiler-generated field
  Action<CallSite, object, object> action = Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site1.Target;
  // ISSUE: reference to a compiler-generated field
  CallSite<Action<CallSite, object, object>> callSite = Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site1;
  object obj1 = instance;
  // ISSUE: reference to a compiler-generated field
  if (Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site2 == null)
  {
    // ISSUE: reference to a compiler-generated field
    Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site2 = CallSite<Func<CallSite, object, object>>.Create(Binder.InvokeMember(CSharpBinderFlags.None, "GetCollectionName", (IEnumerable<Type>) null, typeof (Program), (IEnumerable<CSharpArgumentInfo>) new CSharpArgumentInfo[1]
    {
      CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, (string) null)
    }));
  }
  // ISSUE: reference to a compiler-generated field
  // ISSUE: reference to a compiler-generated field
  object obj2 = Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site2.Target((CallSite) Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site2, instance);
  action((CallSite) callSite, obj1, obj2);
  // ISSUE: reference to a compiler-generated field
  if (Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site3 == null)
  {
    // ISSUE: reference to a compiler-generated field
    Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site3 = CallSite<Action<CallSite, Type, object>>.Create(Binder.InvokeMember(CSharpBinderFlags.ResultDiscarded, "Print", (IEnumerable<Type>) null, typeof (Program), (IEnumerable<CSharpArgumentInfo>) new CSharpArgumentInfo[2]
    {
      CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.UseCompileTimeType | CSharpArgumentInfoFlags.IsStaticType, (string) null),
      CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, (string) null)
    }));
  }
  // ISSUE: reference to a compiler-generated field
  // ISSUE: reference to a compiler-generated field
  Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site3.Target((CallSite) Program.\u003CMain\u003Eo__SiteContainer0.\u003C\u003Ep__Site3, typeof (Program), instance);
  Console.ReadKey(true);
}

      

        
        
        
      

    

Notice how type and activation have been combined into one line. The rest of the method body (except Print Bottom) is for calling two nested methods that look like they've been extended by two calls.