Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
242 views
in Technique[技术] by (71.8m points)

c# - In .NET can a class have virtual constructor?

Can a class have virtual constructor??

If yes, why it is required?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

no, a class cannot have a virtual constructor.

It doesn't make sense to have a virtual constructor. The order in which objects are constructed in C# is by constructing derived classes first, so the derived constructor is always called since the class you want to call is well known at the time of construction.

The other thing is, if you actually type this code out, you can quickly see that it makes very little sense at all

If you had:

public class BaseClass 
{
    public virtual BaseClass()
    {
    }
}

and then

public class InheritedClass : BaseClass
{
    //overrides baseclass constructor but why would you do this given that the     
    //constructor is always going to be called anyway??
    public override InheritedClass()
    {
    }
}

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...