Struct VS Class

Structure(Struct)

structure is a value type data type. It helps you to make a single variable hold related data of various data types. The struct keyword is used for creating a structure.

Structures are used to represent a record. To define a structure, you must use the struct statement. The struct statement defines a new data type, with more than one member for your program.

Classes and Structures have the following basic differences:

• classes are reference types and structs are value types.
• structures do not support inheritance.
• structures cannot have default constructor.

Use When :

• It logically represents a single value, similar to primitive types (int, double, etc.).
• It has an instance size under 16 bytes.
• It is immutable. (No Change)
• It will not have to be boxed frequently

8) Class vs Struct

When to Use Struct :

1. Small

2. Logically an immutable value (no Change)

3. There's a lot of them

Differences:

classes are reference types

static void Main(string[] args)

{

    MyClass myclass = new MyClass();

    myclass.I = 3;

    MyClass myClass2 = myclass;

    myclass.I = 4;

    Console.WriteLine("Class : {0},{1}", myclass.I, myClass2.I);

    MyStruct myStruct = new MyStruct();

    myStruct.I = 3;

    MyStruct myStruct2 = myStruct;

    myStruct.I = 4;

    Console.WriteLine("Struct : {0},{1}", myStruct.I, myStruct2.I);

    myclass.J = 3;

    myclass.ClassMod(myclass);

    myStruct.J = 3;

    myStruct.StructMod(myStruct);

    Console.WriteLine("{0},{1}", myclass.J, myStruct.J);

   

    Console.ReadLine();

}

public class MyClass

{

    public int I;

    public int J;

    public void ClassMod(MyClass mc)

    {

        mc.J += 100;

        Console.WriteLine(mc.J);

    }

}

public struct MyStruct

{

    public int I;

    public int J;

    public void StructMod(MyStruct ms)

    {

        ms.J += 100;

        Console.WriteLine(ms.J);

    }

}

Result :

Class : 4,4

Struct : 4,3

103

103

103,3