CODEWITHSUNDEEP
c#
keerti_h
keerti_h

Reputation: 383

How to access abstract class property inherited to internal class

Suppose I have a internal class "B" which is derived from a abstract class,example

abstract class A
{
    private int _abc;
    public int abc
    {
       get{return _int;}
       set{_abc=value;}
    }
}
internal class B:A
{

}

I need abc in different assembly,can i access it ??? please help me.

Upvotes: 0

Views: 3613

Answers (2)

Viacheslav Smityukh
Viacheslav Smityukh

Reputation: 5833

If you need to safe it internal by the some reason, you have a few ways to access from the external code

1) You can use InternalVisibleToAttribute to grant access to access internals to friendly assemblies

[assembly:InternalVisibleTo("Test.dll")]

2) You can use Reflection to access a member of an object

object obj = <instance of your internal type>;
var value = obj.GetType().GetProperty("abc").GetValue(obj);

3) You can introduce a public interface which will provide a contract to access abc property

public interface IAbcAccessor
{
  int abc {get; set;}
}

internal abstract class A
  : IAbcAccessor
{
    private int _abc;
    public int abc
    {
       get{return _int;}
       set{_abc=value;}
    }

    int IAbcAccessor.abc
    {
       get{return abc;}
       set{abc = value;}
    }
}

External code can access property by the using Interface

var accessor = (IAbcAccessor)<instance of your internal type>;
var value = accessor.abc;

Upvotes: 1

Ian Ringrose
Ian Ringrose

Reputation: 51917

You cannot create an instance of B or declare anything to be of type B outside of the assembly that B is declared in. E.g

B b = whatever

Or 

A b = new B()

Is not allowed outside of the assembly that B is declared in.

However if you have a public method 

public class C
{
   public static A MakeAB()
   {
      return new B();
   }
}

in the assembly that B is declared in, then use can say 

A a = C.MakeABe()

in any assembly, as the type B does not need to be known by the caller of C.MakeAB()

Upvotes: 0

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