What is the T in C#?
T is called type parameter, which can be used as a type of fields, properties, method parameters, return types, and delegates in the DataStore class. For example, Data is generic property because we have used a type parameter T as its type instead of the specific data type.
Does C Sharp have interfaces?
In C#, an interface can be defined using the interface keyword. An interface can contain declarations of methods, properties, indexers, and events. However, it cannot contain fields, auto-implemented properties. An interface can only contain declarations but not implementations.
What are interfaces good for C#?
Interfaces allow us to create nice layouts for what a class is going to implement. Because of the guarantee that the interface gives us, when many components use the same interface it allows us to easily interchange one component for another which is using the same interface.
What is generic interface C#?
A generic interface is primarily a normal interface like any other. It can be used to declare a variable but assigned the appropriate class. It can be returned from a method. It can be passed as argument. You pass a generic interface primarily the same way you would an interface.
What is the T in list T?
T stands for type. t can be any class, interface. The type is passed as a parameter at the runtime. T means Type, for example if you want to create a list that has nothing but strings then this is how you do it.
What is interface C#?
Interface in C# is a blueprint of a class. It is like abstract class because all the methods which are declared inside the interface are abstract methods. It is used to achieve multiple inheritance which can’t be achieved by class. It is used to achieve fully abstraction because it cannot have method body.
Why interfaces are used in C#?
By using interfaces, you can, for example, include behavior from multiple sources in a class. That capability is important in C# because the language doesn’t support multiple inheritance of classes. A class or struct can implement multiple interfaces, but a class can only inherit from a single class.
Should I use interfaces in C#?
In other words, any change to the interface will impact all of the types that extend the interface. The types extending the interface must adhere to the contract. So, use interfaces only when you rarely need to change them. Also, it’s generally better to create a new interface than change an existing one.
When should I use interfaces C#?
That capability is important in C# because the language doesn’t support multiple inheritance of classes. In addition, you must use an interface if you want to simulate inheritance for structs, because they can’t actually inherit from another struct or class.
What is Variant C#?
A variant, or discriminated union type [1], is a type that can hold a value of any of a finite set of types. For example, a Variant can hold either an int or a string value.