I have third party api's which require string values to be submitted as empty strings. On an asp.net page I can use this code (abbreviated here) and it works fine:

public class Customer
{
    private string addr1 = "";
    public string Addr1
    {
        get {return addr1;}
        set {addr1 = value;}
    }

    private string addr2 = "";
    public string Addr2
    {
        get {return addr2;}
        set {addr2 = value;}
    }

    private string city = "";
    public string City
    {
        get {return city;}
        set {city = value;}

    }
}

Customer cust = new Customer();
cust.Addr1 = "1 Main St.";
cust.City = "Hartford";
int custno = CustomerController.InsertCustomer(cust);

The Addr2 field, which was not initialized is still an empty string when inserted.

However, using the same code but called it through a web service based on Windows Communication Foundation the Addr2 field is null. Is there a way (or setting) where all string fields, even if uninitialized, would return an empty string (unless, of course, a value was set).