Complete C# Masterclass

Explore the and operator and end statements, showing how true results require both sides and how the ampersand and not signs govern rain and umbrella outcomes.

Learn how else if controls code flow by evaluating conditions top to bottom. Use age based examples to decide between school, kindergarten, or club scenarios, including a with-parents condition.

Discover how variable scope depends on where a variable is created, and how declaring h inside an if statement limits access, while moving it outside extends its availability.

Explore using if statements in C# with and without curly braces, compare single-line versus multi-line blocks, and advocate always using curly braces for clarity.

Learn how to clean user input with trim, trim start, and trim end, and ensure consistent case by using to lower or to upper.

Demonstrate incrementing and pre-incrementing with a num variable, contrasting post-increment and pre-increment, and show output via string interpolation and basic console printing.

Learn decrementing with minus minus, pre and post forms, and apply plus, minus, multiply, and divide equal. Master the modulo operator and integer-based remainder calculations.

Explore how the while loop works as a counter, compare it to a for loop, and learn how to update a counter to avoid infinite loops.

Explore do-while loops in C#, showing how they execute at least once before testing the condition, in contrast to pretest while loops, with practical examples including user input validation.

Create a two-parameter int adder with a return type, return the sum, and print results separately, illustrating parameter scope and how to pass arguments like 5 and 10.

Explore how scope governs variables and parameters in C#, demonstrating how top-level file variables persist across the file while method parameters and local variables stay confined to their respective methods.

Create a console weather station simulator using arrays, random, and for loops to generate daily temperatures and conditions, then compute averages, highs, lows, and most common conditions.

define member variables as fields inside a class, use private underscore-prefixed fields, and implement a custom constructor to initialize model and brand for car objects, printing results to the console.

Learn how to use multiple constructors in a customer class, including a default constructor, and create objects with full or partial data (name, address, contact number).

Learn how to add and use a class method, drive, that operates on object properties like model and brand to produce instance-specific output, demonstrating object behavior and method reuse.

Explore optional parameters in C# by defining default values for parameters and using them in methods and constructors, then enhance calls with named parameters to omit arguments.

Use named parameters to pass arguments by name, such as first num: 23 and second num: 25, improving readability when a method has many parameters or mixed types.

Learn how a public static int number of cars tracks production, incremented with each new car in the constructor; access the count from the class to verify three cars produced.

Learn how to create read-only properties in C# with an omitted setter, exposing a public ID via a getter and ensuring unique identifiers through a static field.

Compare const and read only in C#: const initializes at compile time and is shared across all instances, while read only initializes at runtime and can vary per instance.

Learn how to build a C# quiz app by defining question and quiz classes, using arrays and the new keyword, and tracking score and user choices.

Define a question class for a console quiz app with question text, answer options, and the correct answer index, plus a constructor and a check method.

Master the display of quiz results by tracking a private score, incrementing on correct answers, and showing a color-coded percentage with messages such as excellent work or keep practicing.

Learn how lists function as dynamic generic collections in C#, with the type T representing items, and compare them to arrays while using add, remove, insert, sort, and index operations.

Explore how to use the find all method with a predicate to filter a list of numbers and return those that are ten or higher.

Explore lambda expressions and predicates in C#, using lambdas with list methods like find all and any to filter data. Learn how to store lambdas in predicates for simple filtering.

Discover how delegates reference methods, use lambda expressions as simplified methods, and assign them to predicates for FindAll to filter lists by logic that returns bool.

Learn to create and manage a list of complex objects in C# by defining a Product class with name and price, then initialize, add, and display items.

Explore legacy hashtables in c# and compare them to dictionaries, learn how to define, populate, and retrieve data using key-value pairs, and cast values to student objects.

Update dictionary entries by key and remove items with the remove method. Iterate through items using a foreach loop on key-value pairs to display IDs and names.

Declare dictionaries with string keys and values, use var and curly-brace syntax, and access safely with try get value and out parameters; iterate and print NY to New York.

Use if-else to control the app flow when you can predict outcomes; resort to try-catch when errors are unavoidable, and remember finally handles cleanup, with a performance cost.

Explore how the throw keyword creates and propagates exceptions to prevent bad data from damaging programs, showing practical examples of input validation and error handling.

Explore handling multiple exceptions in C# by catching specific types like divide by zero, format, and overflow, printing tailored messages and applying default values when needed.

Explore how the call stack propagates exceptions from level two to main, and how try blocks and catch handle or bubble up errors, including default versus specific exceptions.

Examine the three inheritance types supported by C#, and explain why multiple inheritance isn't supported directly, with interfaces as the workaround.

Document code with XML comments using triple slash to describe methods, parameters, and returns. Create a person class with a become older method that uses years and returns new age.

Learn to implement a cat class that adheres to the IAnimal interface in C#, defining eat behavior and sound (meow) and testing with a cat that eats fish.

Master dependency injection and inversion of control, focusing on constructor injection. See a practical builder example injecting a hammer and a saw to supply dependencies.

This lecture introduces setter dependency injection by using properties to set hammer and saw on a builder, showing how dependencies can be assigned after object creation and swapped via polymorphism.

Examine structs as value types in c#, their lack of inheritance, stack storage, and being passed by value, demonstrated with a point struct, its constructors, and a display method.

learn to implement an immutable point struct in C# with a distance method that computes the distance between two points using doubles, and format the result for console output.

Explore enums in C# as a set of immutable constants at the namespace level, illustrated with days and months, showing comparisons, casting to integers, and custom starting indexes.

Explore the C# math class using system.math constants and static methods for rounding, min and max, powers, pi, sqrt, abs, and trig functions like cos.

Discover how C# automatically manages memory with the garbage collector, references, and the memory pool. Learn when collection runs, how finalizers work, and the optional GC.Collect method.