Resolving values of connected object

I have an Person object that has attributes like string name or int age and Profession profession. Profession has attributes like int id and string description.

Now what I want is to extract all the values into a string. The string should look like:

Name: Mr.X, Age: 24, Profession: {Id: 1, Description: IT Specialist}

But with my code I only get

Name: Mr.X, Age: 24, Profession: Models.Profession

My code is:

foreach (PropertyInfo pi in myObject.GetType().GetProperties())
            {
                values += pi.Name + ": " + pi.GetValue(myObject) + ", ";
            }

What am I doing wrong? Please help.

Thanks in advance :)