Complete C# Masterclass

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.

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.

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.

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.

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.

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.

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.

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.

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 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 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.