我可以不用太多使用new来构造组合类吗？

特雷弗·希基（Trevor Hickey）

我有一个基本的类型组成：

class A{
    public A(B1 b1, B2 b2){
        this.b1 = b1;
        this.b2 = b2;
    }
    public B1 b1 {get; private set;}
    public B2 b2 {get; private set;}
}

class B1{
    public B1(C1 c1, C2 c2, C3 c3){
        this.c1 = c1;
        this.c2 = c2;
        this.c3 = c3;
    }
    public C1 c1 {get; private set;}
    public C2 c2 {get; private set;}
    public C3 c3 {get; private set;}
}
class B2{
    public B2(C1 c1, C2 c2, C3 c3){
        this.c1 = c1;
        this.c2 = c2;
        this.c3 = c3;
    }
    public C1 c1 {get; private set;}
    public C2 c2 {get; private set;}
    public C3 c3 {get; private set;}
}

class C1{}
class C2{}
class C3{}

有没有更清洁的构造方法A？

public static void Main()
{
    A a = new A(new B1(new C1(), new C2(), new C3()), new B2(new C1(), new C2(), new C3()));
}

我可以不花new太多时间就能达到相同的构造吗？
我可以对我的构造函数做些什么使它成为可能？

斯科特·张伯伦

如果在默认构造函数中A创建了new B，并且在默认构造函数中B创建了C，则可以将其简化为A a = new A();

class A{
    public A() : this(new B1(), new B2())
    {
    }

    public A(B1 b1, B2 b2){
        this.b1 = b1;
        this.b2 = b2;
    }
    public B1 b1 {get; private set;}
    public B2 b2 {get; private set;}
}

class B1{
    public B1() : this(new C1(), new C2(), new C3())
    {
    }

    public B1(C1 c1, C2 c2, C3 c3){
        this.c1 = c1;
        this.c2 = c2;
        this.c3 = c3;
    }
    public C1 c1 {get; private set;}
    public C2 c2 {get; private set;}
    public C3 c3 {get; private set;}
}
class B2{
    public B2() : this(new C1(), new C2(), new C3())
    {
    }

    public B2(C1 c1, C2 c2, C3 c3){
        this.c1 = c1;
        this.c2 = c2;
        this.c3 = c3;
    }
    public C1 c1 {get; private set;}
    public C2 c2 {get; private set;}
    public C3 c3 {get; private set;}
}

class C1{}
class C2{}
class C3{}

public static void Main()
{
    A a = new A();
}

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