Introduction Introduction - Overview of C# and .NET Framework Introduction - Structure of a C# Program Comments Comments - Single-line, Multi-line, and XML Documentation

Variables Variables - Declaration, Initialization, and Naming Conventions Variables - Scope Variables - Local, Global, and Block-level Variables Data Types Data Types - Value Types vs Reference Types Type Casting Type Casting - Implicit and Explicit Conversions Type Casting - Using Convert Class and Parse() Methods

Strings Strings - Operations, Interpolation, and Formatting Booleans Booleans - Logical Evaluation and Boolean Expressions Math Math - Using the Math Class for Numeric Operations User Input User Input - Using Console.ReadLine() and Type Conversion

Introduction to Operators Operators - Precedence and Associativity Arithmetic Operators Assignment Operators Comparison Operators Logical Operators Bitwise Operators

Introduction to Control Flow If Statement If-Else Statement Switch Statement Conditional (Ternary) Operator Break and Continue

Introduction to Loops For Loop While Loop Do-While Loop Foreach Loop Nested Loops

Arrays Arrays - One Dimensional Arrays - Multi Dimensional Arrays - Jagged Arrays Arrays - Useful Array Methods List List - Using List<T> and Common Methods Dictionary Dictionary - Key-Value Pair Management LinkedList LinkedList - Doubly Linked Lists in C# HashSet HashSet - Storing Unique Values SortedSet SortedSet - Ordered Collections of Unique Values Queue and Stack Queue and Stack - FIFO vs LIFO Data Structures

Introduction to Methods Methods - Defining and Calling Methods Methods - Return Types and Void Methods Method Parameters Parameters - Pass by Value, Pass by Reference (ref, out) Parameters - Default Parameters Method Overloading Overloading - Method Signature Rules and Overload Resolution Recursion

Classes Classes - Creating and Defining Classes Classes and Objects Objects - Instantiating Objects and Accessing Members Constructors Constructors - Default, Parameterized, and Copy Constructors Access Modifiers Access Modifiers - Public, Private, Protected, Internal Properties Properties - Getters, Setters, and Auto-implemented Properties Inheritance Inheritance - Base and Derived Classes Inheritance - The base Keyword Polymorphism Polymorphism - Method Overriding, Virtual and Abstract Methods Interfaces Interfaces - Implementing Multiple Interfaces Abstraction Abstraction - Abstract Classes vs Interfaces Encapsulation Encapsulation - Access Control and Data Hiding Static Classes and Members Static - Using Static for Utility or Shared Functionality Namespaces Namespaces - Organizing Classes and Avoiding Naming Conflicts Indexers and this keyword

Exception Handling Exceptions - try, catch, finally, throw Exceptions - Custom Exceptions File Handling Files - Reading/Writing Text Files using StreamReader, StreamWriter, File, and FileInfo Enumerations Enums - Creating and Using Enums Enums - Enum Methods and Conversions Delegates and Events Delegates - Declaring and Invoking Delegates Events - Using Events and Event Handlers LINQ LINQ - Query Syntax vs Method Syntax LINQ - Filtering, Projection, and Grouping Asynchronous Programming Async - Async/Await Pattern Async - Tasks and Threading Basics