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C# Structs

C# Structs for beginners and professionals with examples on overloading, method overriding, inheritance, aggregation, base, polymorphism, sealed, abstract, interface, namespaces, exception handling, file io, collections, multithreading, reflection etc.

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C# Structs

In C#, classes and structs are blueprints that are used to create instance of a class. Structs are used for lightweight objects such as Color, Rectangle, Point etc.

Unlike class, structs in C# are value type than reference type. It is useful if you have data that is not intended to be modified after creation of struct.

C# Struct Example

Let's see a simple example of struct Rectangle which has two data members width and height.

using System;
public struct Rectangle
{
    public int width, height;

 }
public class TestStructs
{
    public static void Main()
    {
        Rectangle r = new Rectangle();
        r.width = 4;
        r.height = 5;
        Console.WriteLine("Area of Rectangle is: " + (r.width * r.height));
    }
}

Output:

Area of Rectangle is: 20

C# Struct Example: Using Constructor and Method

Let's see another example of struct where we are using constructor to initialize data and method to calculate area of rectangle.

using System;
public struct Rectangle
{
    public int width, height;

    public Rectangle(int w, int h)
    {
        width = w;
        height = h;
    }
    public void areaOfRectangle() { 
     Console.WriteLine("Area of Rectangle is: "+(width*height)); }
    }
public class TestStructs
{
    public static void Main()
    {
        Rectangle r = new Rectangle(5, 6);
        r.areaOfRectangle();
    }
}

Output:

Area of Rectangle is: 30

Note: Struct doesn't support inheritance. But it can implement interfaces.

Next TopicC# Enum




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