Is serializable attribute needed in concrete C# class?

Question

In C#, consider we have a generic class and a concrete class

[Serializable]
public class GenericUser
{ ...

[Serializable]
public class ConcreteUser : GenericUser
{ ...

is it necessary to mark ConcreteUser as [Serializable] or inheritance will take care of it?

Answer 1

Inherited is set to false with the [AttributeUsage] of SerializableAttribute, so yes, you need to set it on the concrete class.

See http://msdn.microsoft.com/en-us/library/system.serializableattribute.aspx for more information.