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Just want to make sure I am not assuming something foolish here, when implementing the singleton pattern in an ASP .Net web application the static variable scope is only for the current user session, right? If a second user is accessing the site it is a different memory scope...?
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Singleton is a design pattern, It means that there will be a single copy of your object inside server memory, which will be shared among all the requests (http/client). So, when you register any dependency in your application as a Singleton, then you will get a single copy of an object per server/node/instance.
Singleton is a creational design pattern, which ensures that only one object of its kind exists and provides a single point of access to it for any other code.
The Singleton Design Pattern, as the name suggests, restricts the instantiation of a class to one object only. In other words, a class that follows the Singleton Design Pattern will not allow more than one instance of it to be created. The typical use cases of the Singleton Design Pattern are: LogManager.
Singleton is a single instance for the lifetime of the application domain. Scoped is a single instance for the duration of the scoped request, which means per HTTP request in ASP.NET. Transient is a single instance per code request.
Static members have a scope of the current worker process only, so it has nothing to do with users, because other requests aren't necessarily handled by the same worker process.
By the way, the default number of worker processes is 1, so this is why the web is full of people thinking that static members have a scope of the entire application.
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