AddSingleton vs AddScoped vs AddTransient 

14 dumbs don't think so

Hello Anil - Thank you very much for the feedback. Means a lot. I have included all the .NET core tutorial videos, slides and text articles in sequence on the following page. Hope you will find it handy. www.pragimtech.com/courses/asp-net-core-mvc-tutorial-for-beginners/ When you have some time, can you please leave your rating and valuable feedback on the REVIEWS tab. It really helps us. Thank you. Good luck and all the very best with everything you are doing.

Hello Naveen - Thank you very much for the feedback. Means a lot. I have included all the .NET core tutorial videos, slides and text articles in sequence on the following page. Hope you will find it handy. www.pragimtech.com/courses/asp-net-core-mvc-tutorial-for-beginners/ When you have some time, can you please leave your rating and valuable feedback on the REVIEWS tab. It really helps us. Thank you. Good luck and all the very best with everything you are doing.

I'm also eager to know !

It would be nice to know what sort of classes to use in which case. GlobalConfig type classes for Singleton, Helpers for Scoped, Transient - no idea - all others?

Thank you very much Nischitha. Means a lot.

a little confusing. Yes, but the real application uses a sql server. then the result is the opposite?

I want it too

Hello Xavier - Yes we will discuss Entity Framework Core in our upcoming videos. In fact we will be discussing how to perform Create, Read, Update and Delete using EF Core.

With AddSingleton() method, could you kindly explain why every time we click the Create button the Total Employees Count increases by one ??? AddSingleton() method creates a Singleton service. With a singleton, there is only one instance and that one instance is shared by all the the HTTP requests. So everytime we click the Create button and add a new employee, that new employee object is added to the single instance of MockEmployeeRepository class. As every request adds a new employee object to that one instance of MockEmployeeRepository the count keeps going up as we click the Create button. Hope this helps.

Could you also kindly explain why we are getting the following behaviour for the AddScoped() method ??? Once we provide the details of a new employee and click the Create button, the Total Employees Count increases to 4 and after the value is increased to 4, no matter how many times we click the Create button, the Total Employees Count does not go beyond 4

With AddScoped() method you get a new instance of MockEmployeeRepository class with every new HTTP request. However with in scope of a given HTTP request the same instance of MockEmployeeRepository class is used. When we relate this to our example, both the Create action method and the Create view gets the same instance of the MockEmployeeRepository class. With every new instance of MockEmployeeRepository class the default employees count is 3 and the Create action adds a new employee. So the employees count becomes 4 and this count can be seen by the Create view as well, both the Create action and the Create view share the same instance of MockEmployeeRepository class. When we click the Create button again, the above process repeats. So the count does not go beyond 4. Hope this answers your question.