I want to use Umbraco .NET Custom Control in Macro. I have gone through following steps:

1) I have created new Macro with name TestProperty Adding Assembly to Macro

2) Browse and Add Pramater from Assembly Brose and Save Property in Umbraco

3) Use Macro in Template enter image description here

I did not get any problem till last step. But when i am previewing my Content then I am getting Page with Error as Below:

enter image description here

My Class code is as Below:

using CustomServiceRepository.Interfaces;

namespace CustomServiceRepository.Repositories
{
    public class EmployeeRepository : IEmployeeRepository
    {
        private int _PvtTotal;
        public int TestProperty { get{return 5;} set{_PvtTotal=value;} }
        public int GetTotalCount()
        {
            return 5;
        }

    }
}

How can I get my Property Value in this case?