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Are static methods good practice?
Static methods are fine in most situations where the singleton pattern gives too much flexibility. For example, take a simple utility such as raising a primitive to a power – obviously you never need to have any polymorphism in that.
Are static classes OK?
Static classes are useful and provide an easy way to access its members that does not need to work differently for different objects. A DatabaseConfig class that may have members such as database name, server name, port number, and even a connection string. We know that these values will not change for objects.
Is there a way to not inherit static classes?
A workaround you can do is not use static classes but hide the constructor so the classes static members are the only thing accessible outside the class. The result is an inheritable “static” class essentially: You can do something that will look like static inheritance. The Inherited class is not static itself, but we don’t allow to create it.
What are the advantages of using static classes?
The advantage of using a static class is that the compiler can check to make sure that no instance members are accidentally added. The compiler will guarantee that instances of this class cannot be created. Static classes are sealed and therefore cannot be inherited.
Why you should prefer singleton pattern over a static class?
It is not possible to inherit from a static class, while it is possible with singleton pattern if you want to allow it. So, anyone can inherit from a singleton class, override a method and replace the service. It is not possible to write an extension method to a static class while it is possible for a singleton object.
Why is the cachedictionary not a static class?
The _cacheDictionary is not static because the object ( Instance) is already static. protected makes possible to inherit from this class. internal makes possible to create an instance of this class from the same assembly or an allowed assembly.