在这个工厂方法中,我想将它约束到一些特定的类,所有这些类都没有默认的构造函数.

这是我的例子.有人可以告诉我是否可以运行它？

public class AbstractClass {
    //this abstract class does not have a default constructor,nor its subclasses
    public AbstractClass(SomeClassName obj) {
        //use obj for initialization
    }
}

//this factory class should create objects of type T that inherit 
//from AbstractClass and invoke the non-default constructor
public class FactoryClass {
    public static T BuildObject<T> (SomeClassName obj) where T: AbstractClass {
        return new T(obj); //does not work?!?!?!
    }
}


//Edit: ANSWER!!!
public static T BuildObject<T>(SomeClassUsedForTheConstructor item) where T : SomeAbstractClass { 
return (T) Activator.CreateInstance(typeof (T),item); 
}