CODEWITHSUNDEEP
c#
Exitos
Exitos

Reputation: 29720

How to inherit a constructor from a sub class

I am writing an abstract base class. I want all the classes that inherit from it to inherit a constructor that basically does the same things for all the classes. Is this possible?

Upvotes: 1

Views: 122

Answers (3)

Thomas Levesque
Thomas Levesque

Reputation: 292405

If the abstract base class has a default constructor (i.e. a constructor with no parameters), it will automatically be called by the derived classes constructors, unless they explicitly call another constructor of the base class.

abstract class B
{
    protected B()
    {
        ...
    }

    protected B(object foo)
    {
        ...
    }
}

class D : B
{
    public D() 
        : base() // not actually necessary, since it's called implicitly
    {
    }

    public D(object foo)
        : base(foo)
    {
    }
}

Upvotes: 2

Arnaud F.
Arnaud F.

Reputation: 8452

Doing your constructor protected will do the stuff

public abstract class A
{
 protected A(string v) { V = v; }
 public string V { get; protected set; }
}

public class AA : A
{
 public AA(string v) : base (v) {}
}

Upvotes: 2

arc
arc

Reputation: 584

In your derived classes constructor, you will need to call your base constructor like so:

base(param1,param2,...)

If you do not call the base constructor explicitly, the default constructor in the base class will be called, if one exists. If not, you will get a compile error.

Upvotes: 0

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