C# Mastering Course For Intermediates

Learn how a C# method is a reusable block of code that may accept parameters, is called to execute, and can return a value or be void.

Learn how to call a method in C# by defining a simple method in a console app, passing parameters, and understanding control flow and output.

Define parameters as variables inside a method to customize results, and pass values or variables as arguments to a method, ensuring the number and types align with declared parameters.

Define optional parameters by assigning a default value with the assignment operator, and use named arguments to pass values in any order.

Learn how C# methods return values with appropriate return types, use return statements, and handle void methods, including examples of multiplying two numbers and using results in later calculations.

Explore expression-bodied methods in C#, converting single-statement methods into concise one-line expressions with return types and parameters, and see practical examples.

Learn the core idea of object oriented programming by comparing procedural and object oriented paradigms, and explore objects, classes, encapsulation, and the dry principle for reusable, maintainable code.

Create an object from a class with new or var, using proper naming. Access members via dot notation and use using directives for namespaces.

Learn how access modifiers govern visibility of classes, fields, methods, and properties in C#, including private, public, protected, internal, and default values, and how public enables the show info method.

Learn how constructors initialize fields in a C# class, including default and overloaded variants. Use this dot notation to assign values and explore access modifiers for private fields.

Explore how encapsulation in C# uses private fields and public properties to read or update values, replacing constructors for ongoing modifications and protecting data.

Learn how automatic properties in C# provide a field-free property through a concise get and set syntax, enabling public access and default zero values for numeric types.

Explore read-only and write-only properties in C# using get and set accessors. Learn how constructors initialize read-only properties and how to use ternary operators in string interpolation.

Learn to apply get and set access modifiers in C# to control read and write access for properties, using private set and selective getters inside and outside the class.

Explore inheritance in C# by illustrating base and derived classes with animals, shapes, and vehicles, and implement constructors, properties, and inherited members in practical examples.

Use inheritance to share add and subtract between Calculator and Calculator Pro, avoiding code repetition, and use the base keyword to pass constructor values from child to parent.

Explore how inheritance in C# uses constructors to initialize base class fields. Learn how access modifiers public, private, protected, and internal govern visibility in parent and derived classes.

Master single inheritance in C# by exploring the object superclass, protected and public access, and why constructors and private members aren’t inherited, with practical animal hierarchy examples.

Explore how polymorphism, via inheritance, lets a base calculator and its derived Calculator Pro implement do all operations differently, using overriding with virtual methods and optional overloading.

Explore polymorphism in c# via inheritance, override methods with virtual, and use the base keyword to call parent implementations from derived classes, illustrating the do all operations pattern.

Master polymorphism in C# by using virtual, override, and base to call parent methods. See how cat, bird, and penguin override eat, illustrating overloading vs overriding.

Explore data encapsulation in C#, bundling multiple data types into a single object with classes or structs, and protect data through private, public, protected, and internal modifiers.

Explore encapsulation with a bank account class that hides balance behind a private field, exposes a public read-only balance property, and uses deposit and withdraw methods to modify it.

Learn how abstraction hides details using abstract classes or interfaces, define abstract methods, and implement them via inheritance and overriding in C#, without instantiating abstract classes.

Learn how to implement abstraction in C# by defining an abstract shape with abstract area and perimeter, then create square and rectangle subclasses that override these methods.

Explore how interfaces enable multiple inheritance in C#, implement interface members in classes, and use this pattern to compose behavior beyond single-class inheritance in C#.

Explore how sealed classes and sealed methods prevent inheritance and overriding in C#, with examples from animal, bird, and chicken to illustrate when to apply them.

Learn how to handle exceptions in C# by converting console input to integers with a try-catch block, using finally for cleanup, and viewing exception messages.

Master catching different exceptions in C# with try, catch, and finally blocks. Learn to handle syntax, runtime, and logical errors, using specific versus general exceptions and understanding block scope.

Learn how to throw and customize exceptions in C# by creating custom exception classes, using not implemented exceptions, and handling them with try-catch blocks while implementing interfaces.

Learn to identify logical errors in C# by debugging a bank account class with deposit and withdraw methods, using breakpoints, step through, and watch windows in Visual Studio.

Learn debugging techniques in C# by tracing logical errors with breakpoints, the watch window, and step operations, fix withdrawals and balance calculations, and verify outputs in the console.