📘 C# Fundamentals and Collections

This repository contains structured and clean examples of C# programming concepts along with console-based implementations.

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🎯 Purpose

• Strengthen C# fundamentals
• Practice coding concepts
• Prepare for technical interviews

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🚀 Who is this for?

• Beginners learning C#
• Developers revising core concepts
• Interview preparation

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📚 Topics Covered

🔹 Basics

• Variables and Data Types
• Type Casting
• Operators

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🔹 Control Statements

• If / Else
• Switch Case
• Loops (for, while, do-while, foreach)

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🔹 Core Concepts (Foundation for OOP)

• Classes and Structure
• Types of Variables (Member, Local, Parameter)
• Access Modifiers
• Modifiers (static, abstract, sealed, etc.)
• Member Functions (Constructor, Static, Instance)
• Return Types
• Properties (Normal & Auto-Implemented)
• Exception Handling (try, catch, finally)

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🔹 Object-Oriented Programming (OOP)

• Class and Object
• Encapsulation
• Abstraction
• Inheritance
• Polymorphism
• Message Passing
• Dynamic Binding

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🔹 Interfaces

• Interface Definition and Syntax
• Method Declarations (Abstract Methods)
• Interface Implementation
• Multiple Interface Implementation
• Implicit Implementation
• Explicit Implementation

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🔹 Inheritance

• Single Inheritance
• Multiple Inheritance (using Interfaces)
• Multilevel Inheritance
• Hierarchical Inheritance
• Hybrid Inheritance

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🔹 Polymorphism

• Compile-Time Polymorphism (Method Overloading)
• Runtime Polymorphism (Method Overriding)

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🔹 Object Creation

• Independent Object Creation
• Dependent Object Creation (Parent reference, Child object)

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🔹 Collections

• Array
• ArrayList
• List
• Hashtable
• Dictionary<TKey, TValue>
• Stack (LIFO)
• Queue (FIFO)

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🔹 Delegates & Events

• Custom Delegates
• Built-in Delegates (Action, Func, Predicate)
• Event Handling (Publisher-Subscriber Model)
• Delegate vs Event

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🔹 Asynchronous Programming

• async and await
• Task-based Programming
• Non-blocking Execution
• Parallel vs Sequential Execution
• Best Practices for Async

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🔹 LINQ (Language Integrated Query)

• Filtering (Where)
• Projection (Select)
• Sorting (OrderBy, OrderByDescending)
• Aggregation (Count, Any, All)
• First / FirstOrDefault
• GroupBy
• Join
• Method Syntax vs Query Syntax

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🛠 Technologies Used

• C#
• Console Application

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▶️ How to Run

1. Clone the repository

   git clone https://github.com/R-Kishore-Kumar-KK/CSharp-Core-Concepts.git
   

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👨‍💻 Author

Kishore Kumar R