Question

Lets say I have a base class and child like this:

class BaseType
{
   string Name{get;set;}
   string AddressLine1 {get;set;}
   string PostalCode {get;set;}
}


class ChildType : BaseType
{
    string extrafield {get;set;}
}

Edit:

My custom Update method is the same for both objects for all but the one extra field. These objects are used in WCF services, so reusing a custom SET WCF Service is what I’m trying to do.

So I would pass in either a BaseType or a ChildType; be able to access the base properties for either object and do what ever logic.

I’m trying to reduce duplication of code.

Answer 1

You can just use BaseType for the argument to the method:

void DoSomethingWithType(BaseType instance)
{
    // Do something here..
    Console.WriteLine(instance.Name);
}

This allows you to write:

ChildType child = new ChildType() { Name = "Foo"; }
DoSomethingWithType(child);