{"id":8773,"date":"2025-03-01T07:00:28","date_gmt":"2025-03-01T07:00:28","guid":{"rendered":"http:\/\/localhost:8080\/csharp-test\/docs\/csharp\/basic-classes-methods-objects\/classes\/"},"modified":"2025-03-26T03:48:07","modified_gmt":"2025-03-26T03:48:07","slug":"classes","status":"publish","type":"docs","link":"https:\/\/www.completecsharptutorial.com\/docs\/csharp\/methods-classes-objects-basic\/classes\/","title":{"rendered":"Classes"},"content":{"rendered":"\t\t
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Classes in C# \u2013 Learn Classes with Easy Examples<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\ud83d\udc4b Introduction \u2013 Why Do We Need Classes in C#?<\/strong><\/h4>

Imagine you\u2019re designing a video game<\/strong>. You have a player, enemies, weapons, and levels<\/strong>. Instead of writing separate code for each, you create a template (class)<\/strong> and use it to make multiple game objects<\/strong>.<\/p>

That\u2019s what classes in C#<\/strong> do! They help you organize code, avoid repetition, and make your program more structured.<\/strong><\/p>

Think of a class as a blueprint<\/strong> for an object. Just like a car blueprint<\/strong> defines how every car of that model is built, a class defines how objects<\/strong> are created and behave. \ud83d\ude97\ud83d\udca8<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\r\n <\/i>\r\n
\r\n
\ud83d\udcda What You Are Going to Learn in This Lesson<\/h5>\r\n

\u2714\ufe0f What are classes in C#<\/strong> and why they are important
\u2714\ufe0f How to define and use a class<\/strong>
\u2714\ufe0f Understanding properties and methods inside a class<\/strong>
\u2714\ufe0f Real-world examples of C# classes
\u2714\ufe0f Common mistakes and best practices<\/p>

Sounds exciting? Let\u2019s jump in! \ud83c\udfaf<\/p> <\/div>\r\n <\/div>\r\n \r\n \r\n \r\n \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\ud83d\udccc What Are Classes in C#?<\/strong><\/h3>

A class in C#<\/strong> is a blueprint<\/strong> for creating objects. It defines properties (data)<\/strong> and methods (behavior)<\/strong> that objects will have.<\/p>

\u00a0<\/p>

\ud83d\udccc Basic Syntax of a Class in C#<\/strong><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\r\n\t\t\t\t\r\n\t\t\t\t\tclass ClassName  \r\n{  \r\n    \/\/ Properties (Variables)  \r\n    \/\/ Methods (Functions)  \r\n}  \r\n\t\t\t\t<\/code>\r\n\t\t\t<\/pre>\r\n            <\/div>\r\n                \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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  • class<\/code> \u2013 Keyword to define a class<\/li>
  • ClassName<\/code> \u2013 Name of the class<\/li>
  • Inside { }<\/code> \u2013 We define properties (variables) and methods (functions)<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \ud83c\udfaf Example 1 \u2013 Defining and Using a Simple Class<\/strong><\/h3>
    Let\u2019s create a Car class<\/strong> with properties and a method.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \r\n\t\t\t\t\r\n\t\t\t\t\tusing System;\r\n\r\nclass Car  \r\n{  \r\n    public string brand = "Toyota"; \/\/ Property  \r\n\r\n    public void ShowBrand() \/\/ Method  \r\n    {  \r\n        Console.WriteLine("Car Brand: " + brand);  \r\n    }  \r\n}\r\n\r\nclass Program  \r\n{  \r\n    static void Main()  \r\n    {  \r\n        Car myCar = new Car(); \/\/ Creating an object  \r\n        myCar.ShowBrand(); \/\/ Calling method  \r\n    }  \r\n}\r\n\t\t\t\t<\/code>\r\n\t\t\t<\/pre>\r\n            <\/div>\r\n                \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\udda5\ufe0f Output:<\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \r\n\t\t\t\t\r\n\t\t\t\t\tCar Brand: Toyota\r\n\t\t\t\t<\/code>\r\n\t\t\t<\/pre>\r\n            <\/div>\r\n                \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\udd0d Explanation:<\/strong><\/p>
    • Class Car<\/code><\/strong> has a property brand<\/code><\/strong> and a method ShowBrand()<\/code><\/strong>.<\/li>
    • Inside Main()<\/code>, we created an object myCar<\/code><\/strong> and called the method.<\/li><\/ul>
      That\u2019s how easy classes in C#<\/strong> make programming! \ud83d\ude80<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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      \ud83c\udfaf Example 2 \u2013 Class with Constructor<\/strong><\/h3>
      A constructor<\/strong> is a method that runs when an object is created. Let\u2019s see how it works.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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      \r\n\t\t\t\t\r\n\t\t\t\t\tusing System;\r\n\r\nclass Car  \r\n{  \r\n    public string brand;  \r\n\r\n    public Car(string carBrand) \/\/ Constructor  \r\n    {  \r\n        brand = carBrand;  \r\n    }  \r\n\r\n    public void ShowBrand()  \r\n    {  \r\n        Console.WriteLine("Car Brand: " + brand);  \r\n    }  \r\n}\r\n\r\nclass Program  \r\n{  \r\n    static void Main()  \r\n    {  \r\n        Car myCar = new Car("Ford"); \/\/ Passing value to constructor  \r\n        myCar.ShowBrand();  \r\n    }  \r\n}\r\n\t\t\t\t<\/code>\r\n\t\t\t<\/pre>\r\n            <\/div>\r\n                \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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      \ud83d\udda5\ufe0f Output:<\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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      \r\n\t\t\t\t\r\n\t\t\t\t\tCar Brand: Ford\r\n\t\t\t\t<\/code>\r\n\t\t\t<\/pre>\r\n            <\/div>\r\n                \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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      \ud83d\udd0d Explanation:<\/strong><\/p>
      • The constructor Car(string carBrand)<\/code><\/strong> initializes the brand<\/code> property.<\/li>
      • When we create an object new Car(\"Ford\")<\/code>, \"Ford\"<\/code> is passed and stored.<\/li><\/ul>
        Now, every time you create a Car<\/code>, you can give it a different brand<\/strong>! \ud83d\ude97<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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        \ud83c\udfaf Example 3 \u2013 Real-World Scenario (Student Class)<\/strong><\/h3>
        Let\u2019s say we are creating a student management system<\/strong>. Every student has a name, age, and grade<\/strong>. Instead of writing separate code for each student, we use a Student class<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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        \r\n\t\t\t\t\r\n\t\t\t\t\tusing System;\r\n\r\nclass Student  \r\n{  \r\n    public string name;  \r\n    public int age;  \r\n    public char grade;  \r\n\r\n    public Student(string studentName, int studentAge, char studentGrade)  \r\n    {  \r\n        name = studentName;  \r\n        age = studentAge;  \r\n        grade = studentGrade;  \r\n    }  \r\n\r\n    public void DisplayInfo()  \r\n    {  \r\n        Console.WriteLine("Student: " + name + ", Age: " + age + ", Grade: " + grade);  \r\n    }  \r\n}\r\n\r\nclass Program  \r\n{  \r\n    static void Main()  \r\n    {  \r\n        Student student1 = new Student("Steven", 20, 'A');  \r\n        student1.DisplayInfo();  \r\n    }  \r\n}\r\n\t\t\t\t<\/code>\r\n\t\t\t<\/pre>\r\n            <\/div>\r\n                \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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        \ud83d\udda5\ufe0f Output:<\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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        \r\n\t\t\t\t\r\n\t\t\t\t\tStudent: Steven, Age: 20, Grade: A\r\n\t\t\t\t<\/code>\r\n\t\t\t<\/pre>\r\n            <\/div>\r\n                \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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        \ud83d\udd0d Explanation:<\/strong><\/p>
        • We created a Student class<\/strong> with name, age, and grade properties<\/strong>.<\/li>
        • The constructor initializes<\/strong> values when creating an object.<\/li>
        • The DisplayInfo() method<\/strong> prints student details.<\/li><\/ul>
          Now, we can create multiple students<\/strong> without rewriting code! \ud83c\udf93<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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          \ud83d\udca1 Why Use Classes in C#?<\/strong><\/h3>
          1. Organizes Code<\/strong> \u2013 Groups related data and methods together.<\/li>
          2. Reusability<\/strong> \u2013 Create multiple objects from the same class.<\/li>
          3. Encapsulation<\/strong> \u2013 Protects data from unwanted modification.<\/li>
          4. Scalability<\/strong> \u2013 Makes your program expandable and maintainable<\/strong>.<\/li><\/ol>
            Without classes, managing large programs would be a nightmare!<\/strong> \ud83c\udfd7\ufe0f<\/p>
            \u00a0<\/h3>
            \u26a0\ufe0f Common Mistakes to Avoid<\/strong><\/h3>
            \u274c Forgetting to create an object<\/strong> before calling a method
            \u274c Using static methods<\/strong> when instance methods are needed
            \u274c Not initializing properties<\/strong> properly
            \u274c Confusing classes with objects<\/strong> (A class is a template, an object is an instance of that class)<\/p>
            \u00a0<\/h3>
            \u2705 Conclusion<\/strong><\/h3>
            You\u2019ve just mastered classes in C#! \ud83c\udf89<\/strong><\/p>
            Now, you know how to define a class, create objects, use constructors, and apply classes to real-world scenarios.<\/strong> This is a huge step toward becoming a C# developer!<\/strong> \ud83d\ude80<\/p>
            Go ahead, try creating your own classes<\/strong> for a Bank Account, Library Book, or Employee Management System.<\/strong> The more you practice, the better you\u2019ll get! \ud83d\udca1<\/p>
            \u00a0<\/h3>
            \u23ed\ufe0f Next What?<\/strong><\/h3>
            Great job! You now understand classes in C#<\/strong>, but what about objects?<\/strong> \ud83e\udd14<\/p>
            In the next chapter,<\/strong> we\u2019ll dive deep into Objects in C#<\/strong>, learn how they work, and explore real-world coding examples!<\/strong><\/p>
            Are you ready? Let\u2019s keep going! \ud83d\ude80<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"
            Learn classes in C# with simple examples. Understand how C# classes work, why they are important, and how to use them in real-world applications.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":8035,"menu_order":80,"comment_status":"open","ping_status":"closed","template":"","doc_tag":[],"class_list":["post-8773","docs","type-docs","status-publish","hentry","no-post-thumbnail"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/docs\/8773","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/comments?post=8773"}],"version-history":[{"count":4,"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/docs\/8773\/revisions"}],"predecessor-version":[{"id":8786,"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/docs\/8773\/revisions\/8786"}],"up":[{"embeddable":true,"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/docs\/8035"}],"wp:attachment":[{"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/media?parent=8773"}],"wp:term":[{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/www.completecsharptutorial.com\/wp-json\/wp\/v2\/doc_tag?post=8773"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}