Help needed in Passing a method in Typeof()

Hi,

I am using swagger for my asp.net core 2.2 documentation and for displaying the response model, i have to use[ProducesResponseType(typeof(ResponseObject), 200)].

In my case, i am not directly returning the Response object. I have a static method which takes the output object as paramater and constructs the ResponseObject.  Details Below,

//Model.cs

Public class UserResponse
{
   public  int UserId { get; set; }
   public  string UserMessage{ get; set; }
}

//Controller.cs

 [Consumes("application/json")]
        [ProducesResponseType(typeof(APIResponse), 200)]

public IActionResult GetUser(string UserName)
        {
         
UserResponse userResponse = dbService.GetUser(UserName);
if(userResponse.UserId > 0)
{
	return Ok(Utility.ConstructResponse(userResponse
                            , Utility.ConstructMessage(1000, "Success"));
}

}

public static class Utility
    {
public static APIResponse ConstructResponse(object objResult,Message message)
        {
            APIResponse baseResponse = new APIResponse();
            TResponse tResponse = new TResponse(System.Net.HttpStatusCode.OK);
            tResponse.TMessage = message;
            tResponse.Result = objResult;
            baseResponse.TResponse = tResponse;
            return baseResponse;
        }
        public static Message ConstructMessage(short Code, string Description)
        {
            return  new Message { Code = Code, Description = Description };
        }
}

So,if i use [ProducesResponseType(typeof(APIResponse), 200)] i am getting the model on the swagger when i lunch the api documentation, The Result object is empty as follows

{"TResponse": {"Version": "string","StatusCode": "Continue","Result": {},"TMessage": {"Code": 0,"Description": "string"
    }
  }
}

<div> </div> <div>Expected Sample output Response Should be </div>

{"TResponse": {"Version": "string","StatusCode": "Continue","Result": {"UserId": 0,"UserMessage": "string"
               },"TMessage": {"Code": 0,"Description": "string"
    }
  }
}

I am not sure how to pass the method in typeof(). Any suggestion how to make the url response like this in the swagger documentation. Any help will be highly appreciated.