Question

I have 2 classes:

public class ClassA

public class ClassB (from another namespace) : ClassA

I use method at ClassA

public static ClassA Deserialize(string path)
{
ClassA classA;

//classA=code...

return classA;
}

I invoke this method at classB

public void DoSomething()
{
ClassB classB=(ClassB)ClassA.Deserialize("c:\directory\file.xml);
}

method deserialize works, but i get error that cannont cast ClassA to ClassB.

How to deal with this?

 public static ClassA DeserializeFromXml(string path)
        {

 XmlSerializer s = new XmlSerializer(typeof(ClassA));
            ClaasA h;

            TextReader r = new StreamReader(path);


                h = (ClassA)s.Deserialize(r);

                r.Close();

                return h;
}

Maybe something with deserialize(string path, Type objectType ) ??

I could can change method Deserialize if it would necessary

Answer 1

A isn’t a B. B is an A

(ClassB) something_that_is_A cannot be done unless it is a B or a derivative of it.