What is property and field in C#?
The difference between field and property in C# is that a field is a variable of any type that is declared directly in the class while property is a member that provides a flexible mechanism to read, write or compute the value of a private field.
Fields are ordinary member variables or member instances of a class. Properties are an abstraction to get and set their values. Properties are also called accessors because they offer a way to change and retrieve a field if you expose a field in the class as private.
A field is a variable of any type that is declared directly in a class or struct. Fields are members of their containing type. A class or struct may have instance fields, static fields, or both. Instance fields are specific to an instance of a type.
Properties expose fields. Fields should (almost always) be kept private to a class and accessed via get and set properties. Properties provide a level of abstraction allowing you to change the fields while not affecting the external way they are accessed by the things that use your class.
Fields are normal variable members of a class. Generally, you should declare your fields as private, then use Properties to get and set their values. By this way you won't affect their values them directly. This is common case practice since having public members violates the Encapsulation concept in OOP.
Member variables or methods in a class or structures are called Fields. Properties are an extension of fields and are accessed using the same syntax. They use accessors through which the values of the private fields can be read, written or manipulated. Properties do not name the storage locations.
In object-oriented programming, a field (also called data member or member variable) is a particular piece of data encapsulated within a class or object.
A field is a variable of any type that is declared directly in a class. A property is a member that provides a flexible mechanism to read, write or compute the value of a private field. A field can be used to explain the characteristics of an object or a class.
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Differences.
| Point of difference | Variable | Property |
|---|---|---|
| Declaration | Single declaration statement | Series of statements in a code block |
| Implementation | Single storage location | Executable code (property procedures) |
Field Declaration Syntax
A Java field is declared using the following syntax: [access_modifier] [static] [final] type name [= initial value] ; The square brackets [ ] around some of the keywords mean that this option is optional. Only type and name are required.
What is a constructor in C#?
Constructors are special methods in C# that are automatically called when an object of a class is created to initialize all the class data members. If there are no explicitly defined constructors in the class, the compiler creates a default constructor automatically.
A method is a code block that contains a series of statements. A program causes the statements to be executed by calling the method and specifying any required method arguments. In C#, every executed instruction is performed in the context of a method.
In C#, one is allowed to create a static class, by using static keyword. A static class can only contain static data members, static methods, and a static constructor.It is not allowed to create objects of the static class. Static classes are sealed, means you cannot inherit a static class from another class.
You should always use properties where possible. They abstract direct access to the field (which is created for you if you don't create one). Even if the property does nothing other than setting a value, it can protect you later on.
Properties can be marked as public , private , protected , internal , protected internal , or private protected . These access modifiers define how users of the class can access the property.
Getters and setters are methods used to declare or obtain the values of variables, usually private ones. They are important because it allows for a central location that is able to handle data prior to declaring it or returning it to the developer.
The main advantage of properties is that they allow us to encapsulate our data inside our class in such a way that we can control access to our class's data through only the properties and not by allowing outside programs to access our fields directly.
A field is an area in a fixed or known location in a unit of data such as a record, message header, or computer instruction that has a purpose and usually a fixed size. In some contexts, a field can be subdivided into smaller fields.
Inheritance is a feature of object-oriented programming languages that allows you to define a base class that provides specific functionality (data and behavior) and to define derived classes that either inherit or override that functionality.
Sometimes, the terms "field" and "attribute" are used interchangeably, and for most purposes, they are the same. However, field describes a particular cell in a table found on any row, and attribute describes an entity characteristic in a design sense.
What is difference between field and variable?
The main difference between the two is that Fields are static or instance values associated and delcared in a type, while on the other hand, local variables are declared in a method.
A field can store the state of an object. Also all fields are variables.
You should always use properties where possible. They abstract direct access to the field (which is created for you if you don't create one). Even if the property does nothing other than setting a value, it can protect you later on.
A property, in some object-oriented programming languages, is a special sort of class member, intermediate in functionality between a field (or data member) and a method.
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Differences.
| Point of difference | Variable | Property |
|---|---|---|
| Declaration | Single declaration statement | Series of statements in a code block |
| Implementation | Single storage location | Executable code (property procedures) |
Consider using a property if the member represents a logical attribute of the type. Do use a property, rather than a method, if the value of the property is stored in the process memory and the property would just provide access to the value.
