C# in Depth: A Comprehensive Course (Beginner-To-Advanced)

This lecture introduces primitive data types such as integers, booleans, chars, strings, and objects, and explains declaring variables, identifiers, and assigning values, with memory and default values examples.

Explore integer types in c#; signed and unsigned ranges defined by memory size, and choosing the right type (byte, short, int) to optimize memory with unit examples.

This lecture explains floating point and decimal types in C#, comparing 32-bit float and 64-bit double, their precision and default values, and how literals use suffixes.

Explore the boolean type in C#, its keyword bool, the two values true and false, and how booleans participate in logical expressions, with default false and equality versus assignment notes.

Learn the C# char data type, its use of single quotes to denote symbols, and how casting converts a char to its integer code.

Explore string types and representation with quotes, whitespace, and empty strings, then learn string concatenation with plus and how object is the base for primitive types like integers and doubles.

Introduce variables by explaining initial values, runtime changes, and storing and retrieving data, with examples of name, type, and data types like integer and bool.

Learn how to declare variables in C# by specifying a type and an identifier, distinguish between declaration and initialization, and follow naming rules for readable, case-sensitive identifiers.

Learn to assign values to variables in C# with the = operator, distinguish it from comparison using ==, and understand declaring and initializing variables, including using new for initialization.

Learn how nullable types work in C#, using int? and double? to represent absent values, initialize variables, and print results in console applications with practical examples.

Explore dynamic types in C#, using the dynamic keyword to invoke methods on values of various primitive types, and learn how runtime binding and string–number operations behave like JavaScript-style typing.

Explore C# operators, including arithmetic, comparison, and assignment operators, with unary and binary forms, operands and expressions, and operator precedence.

Learn how arithmetic operators work in C#, including plus, minus, division, and remainder; distinguish integer and real number division, handle overflow, and avoid divide-by-zero errors.

Explore boolean logic with and, or, not on true and false values, and learn operator precedence as expressions like a and b, a or b, and not b evaluate.

Explore comparison and assignment operators in C#, including greater than, less than, greater or equal, and not equal, plus an intro to bitwise operators on binary numbers.

Develop understanding of comparison and assignment operators in C#, with examples like x = x + 3 and seven divided by two. Learn how = and == affect values.

Learn to print to the console using write and write line, and format output with placeholders like {0} and {1} for dynamic values.

Read input from the console and convert string values to characters and numbers using parse methods such as int.Parse and Convert.ToInt32. Handle parsing exceptions gracefully.

Explore comparison operators such as ==, !=, >, >=, <, <= and logical operators, and learn about if statements, nested if statements, and switch case statements.

Examine conditional statements in C# with if and if-else constructs. Test boolean expressions to choose code paths, with examples like even/odd checks and number comparisons.

Explore how to use nested if statements in c#, including chaining conditions with else if, improving readability with brackets, and limiting nesting to three levels for clarity.

Discover loops in C#, including for and while, with break and continue; learn to avoid copy-paste, promote reusable code, and prevent infinite loops.

Learn to implement while loops in C#, using a boolean condition to repeat a block and apply break for control flow, including computing factorials with a counter.

Explore the do-while loop, which executes its body at least once before checking the condition, and contrast it with the while loop that tests the condition prior to execution.

Explore the for loop, including initialization, boolean test expression, and update expressions, and how the loop runs while the condition holds, with break and continue controlling flow.

Learn how foreach loops iterate over collections and arrays, handling multiple data types by processing each element in sequence and printing results.

Explore nested loops in C#, mastering how inner and outer loops interact, and learn how break and continue control flow while avoiding the harmful goto.

Declare and create arrays in C# by specifying a type with square brackets, initialize them with new or curly braces, access zero-based elements, and iterate with for loops.

Access array elements with the square brackets and a zero-based index to retrieve items, reverse arrays, and set the last element using index -1.

Learn how to read integers from the console, create and size arrays, populate them with input, and print each element and its index with whitespace separation.

Learn to process array elements in C# with for and foreach loops, using for to index elements and foreach to access elements one by one without indexing.

The lecture explains that lists resize dynamically, supporting add and remove while tracking size, unlike fixed-size arrays, and demonstrates integer lists with automatic resizing.

Learn what a method is, how to declare and call it with parameters, return values, and how to reuse code to avoid duplication and improve maintainability.

Declare and create methods in C# using the static keyword, void return types, and parameter lists; understand method bodies, calls, and organizing methods inside a class.

Call methods by using their name and parameters, or empty brackets for no parameters, then execute their bodies. Learn about recursion and calling methods from main or other methods.

Define and use methods with parameters to pass values of different types, control behavior with input arguments, and call them with named or positional parameters.

Explore objects and classes in C#, distinguishing instance versus static members, and learn how constructors, properties, and methods define object state and behavior with an account example.

Discover how classes encapsulate data with fields, properties, and constructors, examine instances and initialization, and compare with structures including inner types and future events, indexers, and operators.

Explore fields as data members, including variables and readonly constants, and contrast them with properties that use get and set accessors to control read and write access.

Explore the difference between instance and static members in C# and how fields, properties, and methods differ. Instance members belong to each object; static members are shared by the class.

Learn how instance and static methods in C# manipulate data, perform tasks, and return values. Use object-dot method calls and class-dot method calls, noting static methods are shared.

Constructors initialize a class by assigning initial field values and you call them with the new operator, and a class can have multiple overloaded constructors with different parameter sets.

Explore enumerations in C# as a predefined set of values, like days of week and colors, and learn to define and use enums, and why integer assignment can be invalid.

Explore what structures are in C# and how they differ from classes as value types and reference types. They are used for simple data storage with fields and properties.

Explore dotnet common types in C#, from primitive types like integers and floats to strings and arrays, and how all types derive from System.Object in an object-oriented framework.

Explore how namespaces organize C# code into manageable structures, with using directives simplifying access to types. Learn how full class names include their namespace for readable, maintainable code.

Explore how the C# random class generates integers using a single parameterless instance, and generate numbers in ranges like 1-49 or 1-98 with loops.

Explore strings in C#, including their immutable character sequences, Unicode support, and common operations. Learn declaring, initializing, casting, and printing strings with practical examples.

Explore string manipulation in C# in depth, including case-insensitive and case-sensitive comparisons, concatenation, equals vs equality operators, indexing, substring extraction, and splitting strings by a separator to form arrays.

Learn how to perform common string operations in C#, including replace, remove parts of a string, change case, trim whitespace, and remove newlines and commas, while understanding string immutability.

Explain string immutability and why repeated concatenation is slow, then show using StringBuilder to append and build strings efficiently with capacity management, including reversal and conversion.

Explore formatting strings in C# by using format specifiers, placeholders, and culture-aware string formatting to control numbers, currencies, dates, and hex representations.