Which constructor will be called when registering services in ConfigureServices

Question

If I have two constructors for a class, how does the service container choose which one to use when I\'m registering that service in ConfigureServices?

So lets say I

Answer 1

I tested it out with the following cases;

1. 1 with an interface (registered), 1 with an interface and a primitive parameter (not registered)

   public Application(ITestClass testClass)

   public Application(ITestClass testClass, string message)

It choses the first one.

2. 1 with an interface (registered), 1 with two interfaces (registered)

   public Application(ITestClass testClass)

   public Application(ITestClass testClass, ITestClass2 testClass2)

It choses the second one.

3. 1 with an interface (registered), 1 with 2 interfaces (registered) and 1 primitive parameter (not registered)

   public Application(ITestClass testClass)

   public Application(ITestClass testClass, ITestClass2 testClass2, string message)

It choses the first one again.

When I registered the string type, it started to choose the second one.

So the long story short, it will try to find the most comprehensive one with the only known dependencies.