How to write elegant string join condition to get full address property

I am using ASP .NET MVC (C#). Wondering how to write elegant condition for geting full address string from address elements. Final FullAddress string should be like this:

"Street HouseNumber, ZIP City"

For instance "Krakonova 23, 12300 Prague"

(But of course, the user can enter only the City too - full address is not required)

I have this model:

public class Address
{
    public int ID { get; set; }
    public string Street { get; set; }
    public string HouseNo { get; set; }
    public string Zip { get; set; }
    public string City { get; set; }        
    public string FullAddress
    {
        get
        {
            string _fullAddress = null;
            // (...)
            return _fullAddress;
        }
}

---

For instance I am thinking about something like:

        get
        {
            string[] _addressPartOne = { this.Street, this.HouseNo };
            string[] _addressPartTwo = { this.Zip, this.City };
            string[] _addressFinal = { string.Join(" ", _addressPartOne.Where(s => !String.IsNullOrEmpty(s))), string.Join(" ", _addressPartTwo.Where(s => !String.IsNullOrEmpty(s)))};
            string _fullAddress = string.Join(", ", _addressFinal.Where(s => !String.IsNullOrEmpty(s)));
            return _fullAddress;
        }