I have following project structure as per below image.

What I want is when I start MainTestAPI project then it should start other Test1, Test2 and Test3 API.

So if MainTestAPI has following URL :

http://localhost:5055

So for test1 it should work like this

http://localhost:5055/api/Test1
http://localhost:5055/api/Test2

I know I can do that from Visual studio by setting multiple projects as startup, but I want to set it from some program.cs OR startup.cs file

So

I am thinking to use url rewriting, but I am not sure if that works or not.

So any help will be appreciated.

Thanks