Serialization of properties from inherited interfaces vs abstract base classes #41749
Description
I would expect that inherited properties of interfaces would be serialized similar to (abstract) base classes.
Given:
public interface IBase
{
string BaseProperty { get; set; }
}
public interface IDerived : IBase
{
string DerivedProperty { get; set; }
}
public class Derived : IDerived
{
public string BaseProperty { get; set; }
public string DerivedProperty { get; set; }
}
public class Data
{
public IDerived Derived { get; set; }
}
Data data = new Data
{
Derived = new Derived
{
BaseProperty = "B",
DerivedProperty = "D"
}
};
string json = JsonSerializer.Serialize(data);
Where the json string is missing the BaseProperty:
{"Derived":{"DerivedProperty":"D"}}
replacing the interface with an abstract class results in:
{"Derived":{"DerivedProperty":"D","BaseProperty":"B"}}
public abstract class IBase
{
public string BaseProperty { get; set; }
}
public abstract class IDerived : IBase
{
public string DerivedProperty { get; set; }
}
public class Derived : IDerived
{
}
public class Data
{
public IDerived Derived { get; set; }
}