Dependency injection in generics

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I ask about if i can do something like that:

C#

//In classlib1.dll
class Context : IdentityDbContext<IdentityUser> 
{
    .............
}

//In classlib2.dll
class MyUser : IdentityUser
{
   extend IdentityUser.......
}

Dependency injection registration:
=> When you find "IdentityUser" use "MyUser"

Posted 10-May-15 3:01am

AhmedYehiaK

Updated 10-May-15 3:02am

v2

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Sergey Alexandrovich Kryukov 10-May-15 11:09am

Sorry, as formulated, the question sounds like total gibberish. We can only guess how on class is related to another one. How is it related to dependency injection. Dependency injection, or any other pattern, cannot be a goal, it may or may not be a part of some solution. But of what problem? You did not explain it.

Do you want to create some class which uses IdentifyUser and derived classes in the way abstracted from the concrete type but using the common interface described by IdentityUser? But then do exactly that, not looking at any patterns...

—SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-05-10T05:21:00

Please see my comment to the question. As your post does not make a real question, there is nothing to answer to.

However, I can give you a couple of hints. First, did you pay attention that you Content class is non-generic? Why? Secondly, here is how the derived classes are abstracted:

C#

class SomethingGeneric<IDENTITY>
    where IDENTITY : IdentityUser
{
    // ...
}

or, say,

C#

class IdentityDbContext<t> { /* ... */ }

class SomethingGeneric<IDENTITY> : IdentityDbContext<IDENTITY>
    where IDENTITY : IdentityUser
{
    // ...
}

Disclaimer: These are only some hints; they might become unrelated to the question, which is not really formulated.

Any questions?

—SA