SOLID: The Single Responsibility Principle

 

Why should a class have only one reason to change? A quick look at the first SOLID principle.

Topics include:

• SOLID Code
• SRP
• Single Responsibility Principle
• Rock, Paper, Scissors, Lizard, Spock

Source code available at: https://github.com/JasperKent/SOLID-Single-Responsibility-Principle

C# Events

 

Most C# developers use events, but do you know how they relate to delegates? Have you ever implemented an event manually? All is explained here.

Topics include:

• C#
• Events
• Delegates
• Lambda expressions
• Auto-implemented events
• Manually-implemented events
• add
• remove

Related videos:

• C# Delegates and Lambdas
  

Source code available at: https://github.com/JasperKent/Events

C# Delegates and Lambdas

 

C# programmers use delegates and lambdas every day. But do we really understand what they are and how the are related?

Topics include:

• C#
• Delegates
• Lambda expressions
• Func
• Action

Related videos:

• C# Events
  

Source code available at: https://github.com/JasperKent/Delegates-and-Lambdas

C# Null Forgiving Operator

 

One of the more obscure features of C#8 is the Null Forgiving Operator. Here's how it works, and when it can get you out of a bind.

Topics include:

• C#
• C#8
• .NET Core
• Nullable references
• Null forgiving operator
• null!

Related videos:

• C# Nullable References
  

Source code available at: https://github.com/JasperKent/NullForgivingOperator

C# Nullable References

 

The biggest new feature in C#8 is nullable references. Here's a quick look at how they work and why you should use them.

Topics include:

• C#
• C#8
• .NET Core
• Composition
• Association
• Nullable references
• Nullable values

Related videos:

• C# Null Forgiving Operator
  

Source code available at: https://github.com/JasperKent/NullableReferences

C# async, await and Task

 

Just like JavaScript, C# has async and await keywords. Here we explore the similarities and differences between the two languages.

Topics include:

• C#
• async
• await
• Tasks
• Task Parallel Library
• Asynchronous programming

Related videos:

• JavaScript Async and Await
  

Source code available at: https://github.com/JasperKent/CSharpAsyncAndAwait

EF Core In-Memory DB Best Practices

 

In-memory databases are great for unit testing, but tread carefully if you want to avoid false positives - and worse, false negatives.

Topics include:

• .NET Core
• Entity Framework Core
• Unit testing
• Test Driven Development
• Mocking
• In-memory databases

Related videos:

• EF Core In-Memory Database

Source code available at: https://github.com/JasperKent/InMemoryDatabase-Best-Practices