When to use a specific or abstract reference type?
855
What does it mean to "program to an interface"?
112804
Java Interface Usage Guidelines -- Are getters and setters in an interface bad?
114977
Why doesn't 'ref' and 'out' support polymorphism?
10150
Should I use static_cast or reinterpret_cast when casting a void* to whatever
533
Encapsulation vs Abstraction?
94015
What is the difference between an abstract function and a virtual function?
91943
What is the use of "ref" for reference-type variables in C#?
58609
When should I use the Visitor Design Pattern?
82611
c++: when to use pointers?
85919
What is the difference between a reference type and value type in c#?
48603
When to use ref and when it is not necessary in C#
66645
Abstract methods in Java
36453
When should I use a CompiledQuery?
50570
When to use an interface instead of an abstract class and vice versa?
90035
Creating the instance of abstract class or anonymous class
26799
A query about the use of Generic Reference with nationalities
72662
Why does a generic type constraint result in a no implicit reference conversion error?