Basics of Generic Classes in C#

Generic classes in C# allow developers to create type-safe and reusable code. By using generics, you can write flexible classes and methods that work with different data types without duplicating code.

What Are Generic Classes?

A generic class is a class with a placeholder for a data type, defined using

Syntax of Generic Classes

📄

public class GenericClass<T>
{
    private T data;

    public GenericClass(T value)
    {
        data = value;
    }

    public void Display()
    {
        Console.WriteLine("Data: " + data);
    }
}

Using Generic Classes

Example: Integer

📄

GenericClass<int> intObj = new GenericClass<int>(100);
intObj.Display();

Generic Classes in C#

Generic classes in C# are a fundamental feature that allows developers to create type-safe, reusable, and flexible code. Instead of writing separate classes for each data type, you can define a generic class that works with any type.

What Are Generic Classes?

A generic class is a class that uses type parameters to operate with different data types while ensuring type safety at compile time. Generics reduce code duplication and improve maintainability.

Basic Syntax of a Generic Class

📄

public class GenericClass<T>
{
    private T data;

    public GenericClass(T value)
    {
        data = value;
    }

    public void Display()
    {
        Console.WriteLine("Data: " + data);
    }
}

Creating Objects of a Generic Class

Example 1: Integer Type

📄

GenericClass<int> intObj = new GenericClass<int>(123);
intObj.Display();

Example 2: String Type

📄

GenericClass<string> stringObj = new GenericClass<string>("Hello, C#");
stringObj.Display();

Advantages of Using Generic Classes

• Type safety: Errors are caught at compile-time.
• Reusability: Write code once and use it for multiple types.
• Performance: Avoids boxing and unboxing.
• Maintainability: Reduces code duplication.

Real-World Use Cases

• Collections: List<T>, Dictionary<TKey, TValue>
• Data structures: Stack, Queue, LinkedList
• Generic repositories in applications
• Algorithms: Sorting, searching, and filtering for multiple data types

Generic classes are a core feature in C# that help developers build flexible, reusable, and type-safe applications. Understanding generics and using them effectively can greatly enhance your coding efficiency and maintainability.

Example: String

📄

GenericClass<string> stringObj = new GenericClass<string>("Hello, C#");
stringObj.Display();

Advantages of Generic Classes

• Type safety at compile time
• Code reusability
• Improved performance (no boxing/unboxing)
• Flexibility for multiple data types

• Collections: List<T>, Dictionary<TKey, TValue>
• Custom data structures like Stack and Queue
• Generic repositories in software architecture
• Algorithms that work with multiple data types

Generic classes in C# are essential for writing reusable, type-safe, and efficient code. Understanding generics helps developers build flexible and maintainable applications while minimizing code duplication.

Frequently Asked Questions (FAQs) About Generic Classes in C#

📄

public class GenericClass<T>
{
    private T data;
    public GenericClass(T value) { data = value; }
    public void Display() { Console.WriteLine(data); }
}