Software Design Patterns and Practices Tutorials

Software Design Patterns tutorials with recommendations and best practices to design and develop highly performing applications that is easy to change.

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4783 views
Abstract: The Maybe Monad is a container that represents a value that may or may not exist. In this tutorial, I will go through some methods that make working with the Maybe monad easier.
7869 views
Abstract: In this tutorial, I will discuss function parameters in C#. I will talk about how function parameters tend to become unclear as we maintain our programs and how to fix them.

The Maybe Monad (C#)

Authored by: Yacoub Massad , on 9/25/2019 in Category Patterns & Practices
11165 views
Abstract: In this tutorial, I will talk about the Maybe Monad; a container that represents a value that might or might not exist.
12551 views
Abstract: In this tutorial, I will talk about ways to handle state in multi-threaded C# applications, including race conditions.
10021 views
Abstract: The article talks about type expressiveness and how we can use the functional Either monad in C# to implement complex business logic that reads as simply as a description of sequential operations. We’ll also look at a technique that allows us to express a complex scenario involving multiple systems as pseudocode and then convert that pseudocode into something we can actually ship to production.
14522 views
Abstract: In this tutorial, I will discuss about global state in C# applications. I will talk about the problems of global state and discuss a solution.
24979 views
Abstract: This tutorial aims to be a guide for designing and implementing asynchronous and parallel data processing using the TPL Dataflow library from Microsoft. The TPL Dataflow consists of different building "blocks" that you compose in a pipeline fashion to structure your application in a clear way, allowing you to write readable and reusable C# code.
10151 views
Abstract: In this tutorial, I am going to go through some examples of data object design in C# and discuss some issues with them.

Composing Honest Methods in C#

Authored by: Yacoub Massad , on 12/16/2018 in Category Patterns & Practices
10904 views
Abstract: In this tutorial, I will provide a proof of concept in C# for composing honest methods. We will see how to create honest programs out of many honest methods.

Writing Pure Code in C#

Authored by: Yacoub Massad , on 10/14/2018 in Category Patterns & Practices
19335 views
Abstract: In this article, I will work on a C# game that contains impure code and work towards making the code pure. I am going to show you how to use PurityAnalyzer—an experimental Visual Studio extension I wrote—to help you write pure code in C#.
39797 views
Abstract: This tutorial demonstrates how to design software using the Command Query Separation (CQS) pattern. We will create a console application and will use C#, Entity Framework, Autofac and Log4Net for our example.

Writing Honest Methods in C#

Authored by: Yacoub Massad , on 7/22/2018 in Category Patterns & Practices
43154 views
Abstract: This C# tutorial describes approaches for making methods/functions more honest. A more honest method makes it easier for readers to understand what the method does by reading its signature, i.e., without reading its implementation.
21349 views
Abstract: This tutorial looks at a new approach to AOP called AOP via functions (in C#) as an attempt to mitigate the issues of the CQS approach.
16271 views
Abstract: This article highlights that software development is a highly complex process with lots of smaller steps that a Software Craftsman should follow in order to build something of quality.
35325 views
Abstract: Learn how to design multi-threading safe data objects in C# and how to “modify” immutable objects using the DataObjectHelper Visual Studio extension. Also use F# to concisely create our data objects, and use them in C# projects.

The Dataflow Pattern in .NET

Authored by: Yacoub Massad , on 1/18/2018 in Category Patterns & Practices
42145 views
Abstract: This article discusses the dataflow pattern, a variant of the producer-consumer pattern, along with examples of applying this pattern in .NET. Finally, you will also be introduced to ProceduralDataflow, a new library I created to help write clean dataflows.
59787 views
Abstract: This article discusses the producer-consumer pattern in .NET, some reasons why we should use it and demonstrates some examples of how to implement it in .NET.
27523 views
Abstract: Flux is a new application architecture introduced by Facebook in May 2014. This article compares the MVC architecture with Flux from various perspectives.
24142 views
Abstract: This article discusses problems and solutions related to resource management in complex C# applications. It also discusses automatic resource management that exists in the .NET framework.
49870 views
Abstract: This article describes how we can use Generics in C# to make our software more resilient to data-related changes, thereby improving its maintainability.
15300 views
Abstract: Is User Experience (UX) important or is it just a buzzword? This article analyzes the usefulness of UX in an application development process.
41898 views
Abstract: The article explains how Behavior Driven Development (BDD) works and provides a real-world example of how to use it to provide meaningful tests which can act as living documentation.
28069 views
Abstract: This article discusses the treatment of data in large C# software applications. More specifically, it discusses runtime data encapsulation, behavior-only encapsulation, and treatment of state.

Revisiting SOLID principles

Authored by: Craig Berntson , on 5/15/2017 in Category Software Gardening
95099 views
Abstract: This tutorial summarizes SOLID principles and answers some questions our viewers have asked about SOLID.
84990 views
Abstract: Effective error and exception handling in any kind of an application plays an important role in providing a pleasant experience to the user, when unexpected failures occur. This article talks about some effective error handling strategies that you can use in your projects.
20395 views
Abstract: This article describes how to do unit and integration testing using the Composition Root as the source of Systems Under Test (SUTs).
40152 views
Abstract: We will discuss Code Quality in the .Net ecosystem, with a brief look at tools included in Visual Studio and other third-party commercial tools.

Reduce Bad Code with Code Reviews

Authored by: Craig Berntson , on 3/16/2017 in Category Software Gardening
28190 views
Abstract: Do you think code reviews aren’t important? Think again. Code reviews are often recognized as the best way to improve code quality. This article will discuss the importance of code reviews, different types of code reviews, and how to conduct a code review.
54341 views
Abstract: Singleton is one of the basic software design patterns, but if not implemented correctly can introduce complications in your application. This article discusses common use cases where you should avoid the Singleton pattern.
34343 views
Abstract: Coding guidelines are just one of the many tools developers should have available in their toolshed. By using them, you will help ensure that your code is lush, green, and vibrant.
21161 views
Abstract: C# examples on how we can use the Text Template Transformation Toolkit (T4) to create aspects.
135373 views
Abstract: This article focuses on .NET Design Patterns using C# and takes a fresh view of some of the existing ones and see how we can go about using them in real world dilemmas and concerns.
114688 views
Abstract: Aspect Oriented Programming (AOP) in C# using SOLID principles. We will discuss challenges posed by context-independence in SOLID code bases, and provide a solution for them.
19792 views
Abstract: Agility and contractual development against a fixed price are conceptually two ends of a spectrum. In this article, we will see an option for companies to be agile even when they are executing a contractual fixed bid project

Object Composition with SOLID

Authored by: Yacoub Massad , on 7/18/2016 in Category Patterns & Practices
49062 views
Abstract: This article demonstrates how Object Composition with SOLID helps an application evolve.
46001 views
Abstract: Using Pure DI and the single level of abstraction per function rule to create Composition Roots that we can understand and navigate easily
38214 views
Abstract: Using Dependency Injection and SOLID principles to ensure testable and maintainable software.
24135 views
Abstract: This article presents a perspective of Liskov Substitution Principle (LSP) and presents an argument against some interpretation and practices of LSP that some people have/follow.
26997 views
Abstract: The Interface Segregation Principle (ISP) states that interfaces should be small and should contain only those methods or properties that are effectively required. We will explore ISP in this article.
42840 views
Abstract: Liskov Substitution Principle (LSP) is a SOLID principle that says that given a specific base class, any class that inherits from it, can be a substitute for the base class. We will explore LSP in this article.
39902 views
Abstract: The Open-Closed Principle (OCP) in SOLID states that a Software Entity should be open for extension but closed to modification. Learn about this principle in this article.
49843 views
Abstract: The Single Responsibility Principle (SRP) states that a class should do one thing and one thing only. Learn about this principle in this article.

Object Oriented Programming (C#)

Authored by: Craig Berntson , on 5/2/2015 in Category Software Gardening
36919 views
Abstract: This article talks about Object Oriented Programming (OOP), starting with the basics and with examples in C#.
64838 views
Abstract: Code refactoring isn’t code rewriting. Refactoring is the process of restructuring existing computer code without changing its external behaviour. This Software Gardening article talks about what is refactoring, why to refactor your code and the built-in refactorings in Visual Studio.
30294 views
Abstract: What is Agile Software Development? How well is Agile working for you? Where do you need to make changes? This Software Gardening article analyses Agile to see what it really means.

12 Unit Testing Myths and Practices

Authored by: Eli Lopian , on 1/27/2015 in Category Patterns & Practices
34547 views
Abstract: This article presents the most widely misunderstood concepts about unit testing today and provides relevant information about how the practice actually occurs.
26754 views
Abstract: This article talks about applying Continuous Delivery techniques to deliver working software.
73025 views
Abstract: Get started with unit testing using a simple ASP.NET MVC application. You’ll see how to setup the test and remove the database from the testing process.
43019 views
Abstract: Essential IT Admin skills that every .NET developer should have before going Live.

Software Branching Practices

Authored by: Craig Berntson , on 7/9/2014 in Category Software Gardening
30321 views
Abstract: This tutorial explains some best practices to help you improve your Software branching and merging techniques and in turn improve your code.
22642 views
Abstract: This article talks about continuous learning and why software developers must take responsibility for their skills and career. The author also shares some valuable resources to get you started.

Software Craftsmanship

Authored by: Craig Berntson , on 3/19/2014 in Category Software Gardening
30722 views
Abstract: This article talks about who is a Software craftsman, Software Craftsmanship, and what it is all about.
29113 views
Abstract: We begin our discussion of Good Project Management Techniques (Software Gardening) by discussing good soil, which in our case isn’t a software development technique at all, but is dependent on project management.
42777 views
Abstract: Comparing software development to constructing a building is wrong. This article discusses why construction is the wrong metaphor and that software is organic and changes in unpredictable ways
57463 views
Abstract: There are many best practices articles and coding guidelines for BizTalk, that are floating around the net, but they are not very conducive and pragmatic enough to the ‘IT services’ industry (especially in an offshore development model), to leverage them in their turnkey or T&M projects. This article attempts to fill those gaps.

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