How to get only base class properties from derived class?

Question

My code is like this

public class BaseClass
{
    public string Field1 { get; set; }
}

public class DerivedClass: BaseClass
{
    public string Field2 { get; set; }
}

var obj = new DerivedClass { Field1 = "aaa", Field2 = "bbb" };

I have to serialize obj but I only need the BaseClass properties since DerivedClass properties are "additional info" which is added after deserialization.

How can I get them? (I can't use [JSonIgnore] decorator because I have to send DerivedClass objects over websocket and I'll lose informations)

Answer 1

You could provide your BaseClass with a constructor that takes a BaseClass as parameter und takes necessary information. This way you could create a new object and serialize it:

public class BaseClass
{
    public string Field1 { get; set; }

    public BaseClass(){ }
    public BaseClass(BaseClass dc)
    {
        this.Field1 = dc.Field1;
    }
}

public class DerivedClass : BaseClass
{
    public string Field2 { get; set; }
}

Calling it like this:

var obj = new DerivedClass { Field1 = "aaa", Field2 = "bbb" };

BaseClass obj_base = new BaseClass(obj);