2 using System.Runtime.Serialization;
4 namespace VersionTolerantSerializationTestLib
9 private string Street = "v4-Street";
10 private string City = "v4-City";
11 private string CountryCode = "v4-CountryCode";
13 [OptionalField (VersionAdded = 4)]
14 private string PostCode;
16 public override string ToString () {
17 return String.Format ("v4 obj {0} {1} {2}", Street, City, CountryCode);