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c# Programming Glossary: fruitC# : Is Variance (Covariance / Contravariance) another word for Polymorphism? http://stackoverflow.com/questions/1078423/c-sharp-is-variance-covariance-contravariance-another-word-for-polymorphis can treat any reference to a Banana as a reference to a Fruit but that doesn't mean you can substitute Fruit every time you.. to a Fruit but that doesn't mean you can substitute Fruit every time you see the type Banana . For example a List Banana.. . For example a List Banana can't be treated as a List Fruit because list.Add new Apple is valid for List Fruit but not for..
What's the correct alternative to static method inheritance? http://stackoverflow.com/questions/1380087/whats-the-correct-alternative-to-static-method-inheritance I want to create an abstract base class let's call it a Fruit that encapsulates some complex initialization code. This code.. since some of it will rely on virtual method calls. Fruit will be inherited by other concrete classes Apple Orange each.. improve this question One idea public abstract class Fruit T where T Fruit T new public static T CreateInstance T newFruit..
Difference between Covariance & Contra-variance http://stackoverflow.com/questions/2184551/difference-between-covariance-contra-variance . Consider the following two sets of types Animal Tiger Fruit Banana . And this clearly related set IEnumerable Animal IEnumerable.. set IEnumerable Animal IEnumerable Tiger IEnumerable Fruit IEnumerable Banana There is a mapping from the first set to.. Tiger Tiger Animal Animal Animal Banana Banana Banana Fruit Fruit Fruit In C# 4 there is an assignment compatibility relationship..
How is Generic Covariance & Contra-variance Implemented in C# 4.0? http://stackoverflow.com/questions/245607/how-is-generic-covariance-contra-variance-implemented-in-c-sharp-4-0 give in the book of trying to use a List Banana as a List Fruit or whatever it was still won't work but a few other scenarios..
http://stackoverflow.com/questions/4034495/question-about-c-sharp-covariance the error to be IList Apple apples new List Apple IList Fruit fruitBasket apples fruitBasket.Add new Banana Aargh Added a..
Covariance and contravariance in programming languages http://stackoverflow.com/questions/1163465/covariance-and-contravariance-in-programming-languages we might assume that our routine could add some other fruit which was not an apple as above. Hence we should only like immutable..
hexadecimal value 0x20 cannot be included in a name http://stackoverflow.com/questions/15000160/hexadecimal-value-0x20-cannot-be-included-in-a-name slash as part of the name Data DataRow Orange Apple fruit Orange Apple DataRow Data seems invalid to me but just want..
still confused about covariance and contravariance & in/out http://stackoverflow.com/questions/3445631/still-confused-about-covariance-and-contravariance-in-out of the out type parameter is OK. Hence IEnumerable Fruit fruit new List Apple Since Apple is a Fruit List Apple can be safely.. Func Fruit it can be converted to Func Apple . Func Fruit fruitFunc fruit Func Apple appleFunc fruitFunc Why are they called.. it can be converted to Func Apple . Func Fruit fruitFunc fruit Func Apple appleFunc fruitFunc Why are they called co contravariance..
Create instance of generic type? http://stackoverflow.com/questions/731452/create-instance-of-generic-type that accepts an int weight can I instantiate a piece of fruit in a generic method like this public void AddFruit T where T.. this public void AddFruit T where T BaseFruit BaseFruit fruit new T weight new Apple 150 fruit.Enlist fruitManager An example.. T BaseFruit BaseFruit fruit new T weight new Apple 150 fruit.Enlist fruitManager An example is added behind comments. It..
http://stackoverflow.com/questions/9018142/is-it-a-good-way-of-unit-testing-to-use-another-tested-function-to-make-prepara The class under test holds a list of strings containing fruit names where new fruit names can be added via class_under_test.addNewFruit.. holds a list of strings containing fruit names where new fruit names can be added via class_under_test.addNewFruit ... . So.. broken in a single way you could try to expose underlying fruits list internally and use InternalsVisibleTo attribute or passing..
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