Hello,

I'm still quite new to angular2, and I have a question about DI injection 
on components.
Component has a providers attribute in order to allow DI of services, but I 
have seen most of the time this is not used at all and the Services are 
injected in the boostrap. I would like to understand why, and what is the 
difference?

Let's say I have 2 "standalone" components that requires the same service. 
If I set the providers attribute will this create 2 services ?

Thanks.

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