When designing applications, it is important to know when to use an abstract class and when to use an interface. Although abstract classes and interfaces seem similar in some ways, there are key ...

all of your classes that implement the interface would have to be updated. With C# 8.0, you can now have default implementations of methods in an interface. Interface members can be private ...

thanks<BR>everything you suggested works, except i can't use 'as' to convert from the interface to the struct. i have to use a regular cast for that (because structs are not reference types, the ...

A method can be reused in multiple objects. Methods also provide an interface that other classes use to modify object properties. Abstract classes can have abstract and regular methods. Abstract ...

If you have a Dog class, for example, that derives from Animal, you can have a method that accepts an IReadOnlyList<Animal> and pass it an IReadOnlyList<Dog>. The IReadOnlyCollection interface, which ...