public class AutofacFactory2
{
IBank bank;
public AutofacFactory2()
{
Type objTypeService = Type.GetType("Cropay.Bank.IBank");
Type objTypeA = Type.GetType("Cropay.Bank.Bank50");
Type objTypeB = Type.GetType("Cropay.Bank.Bank51");
var builder = new ContainerBuilder();
builder.RegisterType(objTypeA).Named("Cropay.Bank.Bank50", objTypeService);
builder.RegisterType(objTypeB).Named("Cropay.Bank.Bank51", objTypeService);
IContainer container = builder.Build();
bank = container.ResolveNamed<IBank>("Cropay.Bank.Bank51");
}
https://www.cnblogs.com/kissfu/p/3482069.html#t1