Javatpoint Logo
Javatpoint Logo

Difference between struct and class in C#

In this article, we will discuss the difference between struct and class in C#. But before discussing its differences, we must know about the struct and class in C#. Classes and structures can be used in C# to build custom data types but have important differences. Unlike structures, classes can be inherited from other classes. Put differently, a structure cannot be inherited from a class.

The difference between a reference type and a value type is that classes are reference types, meaning whenever you create a component of a class, a reference to that object is also created, and any changes to the object in question are reflected whenever the reference is used.

On the other hand, a structure is an integer type, which implies that when you create a structure-type variable, the variable's actual amount is saved in memory. In contrast, modifications to the variables cannot be seen elsewhere.

What is a Class?

A class is a user-defined blueprint or prototype used to build things. A class combines fields and methods (member functions defining actions) into a single unit.


Filename: Class.cs


Author's Name: John Doe
Primary Language: C#
Total Published Articles: 80
Total Authored Improvements: 50

What is Structure?

Structure is a value type and a collection of variables of various data kinds contained within a single unit. It is comparable to a class because both are user-defined data types that hold a variety of data types. C# allows you to use predefined data types. However, the user may need to design its own data types, commonly called User-Defined Data Types. Although it falls under the value type, the user can edit it to meet their needs, which is also known as the user-defined information type.


It has the following syntax:


Filename: Struct.cs


Information about person1: Name: Alice Johnson, Age: 25, Body Weight: 65

Main Difference between Struct and Class:

There are several main differences between struct and class in C#. Some main Differences between struct and class are as follows:

Default Constructor: The default constructor is always called whenever a class's object is formed. On the other hand, a structure doesn't come with a default constructor.

Initialization: Whenever you create a class object, its components are set to the default settings (null for types of references and 0 for values types). Whenever you create an object of the type variable, all its members have been set using their default values. Whenever you create a variable of the structure's type, users can supply initial values for each structure component.

Size of performance: Structures are typically smaller than classes since they don't include reference parameters or overhead. It means structures may be faster than classes to pass as arguments or copy.

In C#, the key distinctions between subclasses and structures include inheritance, reference type vs. value type, default constructor, its initialization, and size/performance. The structures serve the purpose of smaller, simpler things that are used regularly and need to be passed around fast, whereas classes are used for larger, more sophisticated objects. However, both classes and structures have advantages and disadvantages, and the project's specific requirements ultimately determine their decision.

Head-to-head comparison between struct and class in c#

There are several head-to-head comparisons between struct and class in C#. Some main Differences between struct and class are as follows:

Class Structure
Classes are of the reference type Structs are value types.
All of the reference types are assigned heap memory. Any of the value types are allotted stack memory.
Allocation of large reference types is less expensive than allocating large value types. Allocation and de-allocation are less expensive in the value type compared to the reference type.
The class has numerous aspects. Struct has limited capabilities.
Classes are commonly utilized in large programs. Structs are used in small programs.
Classes can include constructors and destructors. Structures have not parameter less or destructors, although they may have parameterized or static constructors.
Classes created instances with the new keyword. With or without the new keyword, Struct can generate an instance.
A class can be descended from a different group. It is not permitted for a Struct to inherit from a different struct or class.
A class's data component can be encrypted. A struct's data member cannot be protected.
A class function member can be private or abstract. The struct's function members can't be virtual or abstract.
Two variables of the same class can have the same object's reference. It is and actions performed on one variable can affect another. Every variable in struct has its own copy of data (with the exception of the in-ref and out-parameter variables), and any action performed on one variable has no effect on another.

Youtube For Videos Join Our Youtube Channel: Join Now


Help Others, Please Share

facebook twitter pinterest

Learn Latest Tutorials


Trending Technologies

B.Tech / MCA