C#

The C# language itself: its types, object-oriented design, collections, LINQ and async. The runtime, hosting, web and data access are under .NET and ASP.NET Core.

The language

CSCORE

C# building blocks

Read and write the core C# constructs that everything else is built on.

0/11 read
11 notes
  1. Delegates
  2. From delegates to callbacks, events, LINQ and async
  3. Events
  4. EventArgs and event data
  5. Lambda expressions
  6. Generics
  7. Generics at compile time and at runtime
  8. Extension methods
  9. Extension methods: custom types, value types and using
  10. Attributes and reflection
  11. Source generators versus reflection
CSTYPES

C# types: class, struct, interface and record

Choose between a class, a struct, an interface and a record, and know what each does when it is copied or compared.

0/6 read
6 notes
  1. Value types and reference types
  2. Class versus struct
  3. Records
  4. Records: the () way and the {} way
  5. Init-only setters
  6. Choosing a type
CSMODERN

Modern C#

Use the modern C# features that cut boilerplate and null bugs.

0/7 read
7 notes
  1. Pattern matching
  2. Relational, logical and list patterns
  3. Switch expressions
  4. Nullable reference types
  5. Records
  6. Init-only setters
  7. Other modern C# features

Design

CSOOP

Object-oriented programming in C#

Explain the four pillars of OOP in C#, and choose between an interface and an abstract class.

0/6 read
6 notes
  1. Encapsulation
  2. Abstraction
  3. Inheritance
  4. Polymorphism
  5. Method hiding with new
  6. Interfaces versus abstract classes
CSSOLID

SOLID principles in C#

Apply the five SOLID principles to C# code, and spot when one is being broken.

0/6 read

Builds on: Object-oriented programming in C#

6 notes
  1. SOLID at a glance
  2. Single Responsibility Principle
  3. Open/Closed Principle
  4. Liskov Substitution Principle
  5. Interface Segregation Principle
  6. Dependency Inversion Principle
CSPATTERNS

Design patterns in C#

Recognize the common design patterns in C# code, and use one only when it solves a real problem.

0/5 read

Builds on: Object-oriented programming in C#

5 notes
  1. What design patterns are
  2. Creational patterns
  3. Structural patterns
  4. Behavioral patterns
  5. Repository pattern

Data and async

CSDATA

C# collections and Big O

Pick the right C# collection for the job, and judge its cost with Big O.

0/6 read
6 notes
  1. Big O notation
  2. Arrays, lists and linked lists
  3. Dictionary and HashSet
  4. Stack and Queue
  5. Choosing a collection
  6. Sorting and searching
CSLINQ

LINQ in C#

Write LINQ queries, and know when and where they run.

0/4 read

Builds on: C# building blocks

4 notes
  1. LINQ: query syntax and method syntax
  2. Deferred execution
  3. ToList and what it returns
  4. LINQ providers: IQueryable and IEnumerable
CSASYNC

Async in C#

Write async code that does not block threads, and know where it goes wrong.

0/11 read

Builds on: C# building blocks

11 notes
  1. Processes, threads and context switches
  2. The thread pool
  3. Async and await
  4. How await works under the hood
  5. Task.Run: when it helps and when it doesn't
  6. I/O-bound or CPU-bound?
  7. Is this library method CPU-bound or I/O-bound?
  8. Task combinators
  9. Thread.Sleep versus Task.Delay
  10. Async pitfalls
  11. Why async void is dangerous

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