What is C# boxing?
Boxing is the process of converting a value type to the type object or to any interface type implemented by this value type. When the common language runtime (CLR) boxes a value type, it wraps the value inside a System. Object instance and stores it on the managed heap. Unboxing extracts the value type from the object.
Why boxing and unboxing is needed in C#?
Boxing and unboxing is an important concept in C# . C# Type System contains three data types: Value Types (int, char, etc), Reference Types (object) and Pointer Types. Boxing and Unboxing enables a unified view of the type system in which a value of any type can be treated as an object.
What is the difference between unboxing and boxing?
The basic difference between Boxing and Unboxing is that Boxing is the conversion of the value type to an object type whereas, on other hands, the term Unboxing refers to the conversion of the object type to the value type.
What is boxing and unboxing What are the performance implications?
Boxing and unboxing are computationally expensive processes. When a value type is boxed, an entirely new object must be created. This can take up to 20 times longer than a simple reference assignment. When unboxing , the casting process can take four times as long as an assignment.
What is cast in C#?
A cast is a way of explicitly informing the compiler that you intend to make the conversion and that you are aware that data loss might occur, or the cast may fail at runtime. To perform a cast , specify the type that you are casting to in parentheses in front of the value or variable to be converted.
What is immutable in C#?
An immutable object is defined as an object that cannot be changed after it has been created. For many use cases, such as Data Transfer Objects, immutability is a desirable feature.
What is serialization in C#?
Serialization is the process of converting an object into a stream of bytes to store the object or transmit it to memory, a database, or a file. Its main purpose is to save the state of an object in order to be able to recreate it when needed. The reverse process is called deserialization.
Why we use delegates in C#?
Delegates are used to define callback methods and implement event handling, and they are declared using the “ delegate ” keyword. You can declare a delegate that can appear on its own or even nested inside a class. There are three steps in using delegates . These include declaration, instantiation, and invocation.
What is the difference between ref and out in C#?
The in, ref, and out Modifiers ref is used to state that the parameter passed may be modified by the method. in is used to state that the parameter passed cannot be modified by the method. out is used to state that the parameter passed must be modified by the method.
What is generic in C#?
Advertisements. Generics allow you to define the specification of the data type of programming elements in a class or a method, until it is actually used in the program. In other words, generics allow you to write a class or method that can work with any data type.
What is reflection C#?
Reflection provides objects (of type Type) that describe assemblies, modules, and types. You can use reflection to dynamically create an instance of a type, bind the type to an existing object, or get the type from an existing object and invoke its methods or access its fields and properties.
How can generics avoid boxing and unboxing?
With Generics you avoid doing boxing / unboxing since you are dealing with the parameter type T , which is a natural parameter that the compiler will replace it with the concrete type at compilation time without doing the boxing operation at runtime.
What is value type and reference type in C# with example?
While value types are stored generally in the stack, reference types are stored in the managed heap. The built-in reference types supported by C# include: object, string, and dynamic. All fundamental data types , Boolean, Date, structs, and enums are examples of value types .