Can't reflect all properties from instance object

I have SharePoint VisualWebPart where i try to reflect properties from instance object, but PropertyInfo array is empty, when i try the same on class its ok and i have all properties, all members are properties, not just fileds, all public. I tested it at home with console project and everything was fine, but at SharePoint it's not working. Here is example. What is the reason of that behavior?

 class Program
{

    public class Act
    {
       public string ID { get; set; }
       public string Title  {get;set;}
       public string DestroyData {get;set;}
       public string Count { get; set; }
    }

    static void Main(string[] args)
    {
        Act act = new Act();
        Console.Write(act.GetType().GetProperties().Aggregate(new StringBuilder("Instance Properties - "), (s,c) =>  s.AppendFormat("{0}, ",c.Name) ));  // <--- this is empty
        Console.WriteLine();
        Console.Write(typeof(Act).GetProperties().Aggregate(new StringBuilder("Class Properties - "), (s, c) => s.AppendFormat("{0}, ", c.Name))); // but this have all properties
        Console.WriteLine();
        Console.Write("act.GetType() == typeof(Act) - {0}", act.GetType() == typeof(Act)); // thats true
        Console.ReadKey();
    }

}