class Product
{
private string partA; //定义部件，部件可以是任意类型，包括值类型和引用类型
private string partB;
private string partC;
public string PartA
{
        get { return partA; }
        set { partA = value; }
    }
    public string PartB
    {
        get { return partB; }
        set { partB = value; }
    }
    public string PartC
    {
        get { return partC; }
        set { partC = value; }
    }
}

abstract class Builder
{
    //创建产品对象
    protected Product product = new Product();
    public abstract void BuildPartA();
    public abstract void BuildPartB();
    public abstract void BuildPartC();
    //返回产品对象
    public Product GetResult()
    {
        return product;
    }
}

class ConcreteBuilder1 : Builder
{
    public override void BuildPartA()
    {
        product.PartA = "A1";
    }
    public override void BuildPartB()
    {
        product.PartB = "B1";
    }
    public override void BuildPartC()
    {
        product.PartC = "C1";
    }
}

class Director
{
    private Builder builder;
    public Director(Builder builder)
   {
        this.builder = builder;
    }
    public void SetBuilder(Builder builder)
    {
        this.builder = builder;
    }
    //产品构建与组装方法
    public Product Construct()
    {
        builder.BuildPartA();
        builder.BuildPartB();
        builder.BuildPartC();
        return builder.GetResult();
    }
}

……
Builder builder = new ConcreteBuilder1(); //可通过配置文件实现
Director director = new Director(builder);
Product product = director.Construct();
……