Dialog View Controller Question (Reflection)

I cant seem to find an answer to this in the documentation. I am trying to create a Dvc with reflection and would like to return a combination of two nested fields as a summary(might be using the wrong term here) to the top level dialog view controller. Here is the code I am working with, I have tried a lot of things and did not seem to get anywhere so this is the bare bones. I would like to return first name + " " + last name as the summary for the top level view controller.

  
var menu = new MainTable()
                {
                    user = new MainTable.UserInfo()
                };
            var bctx = new BindingContext(null, menu, "Test Table");
            var dvc = new DialogViewController(bctx.Root);
  

  
public class MainTable
    {
        [Section("Submit As")]
        [Caption("")]
        public UserInfo user;

        public class UserInfo
        {
            [Section("Your Info")]
            [Entry("First Name")]
            public string FirstName;

            [Entry("Last Name")]
            public string LastName;
        }
    }