Join Reynald Adolphe for an in-depth discussion in this video Using a singleton, part of C# Best Practices for Developers.
- [Instructor] A singleton is a common design pattern,…and you can actually learn more about it…in my Design Patterns course.…It is essentially a class…that provides one instance.…So for example, say you have a desktop application…that manages insurance policies.…When someone logs in,…they may need to deal with their one policy…to read, delete, or modify.…So we can define the policy as a singleton…during the entire execution of the application.…
As you can see here,…let's walk through the code,…starting on line 22,…where we define the class.…We move on down to where we have…our static Policy called _instance.…On line 26, we have the accessibility modifier…which is set to private,…to prevent others from accessing it.…On line 28 through 35,…we've added a static property…that creates the instance…if, and only if one doesn't already exist,…and that instance can be accessed…by typing in Policy.instance.…
Now, this is a fairly straightforward example…of a singleton,…but for a more detailed explanation,…actually using this example,…
Author
Reynald Adolphe
Released
6/5/2018- Naming and handling classes
- Running a unit test
- Using constructors
- Naming and handling methods, fields, and properties
- Using properties correctly
- Managing objects efficiently
- Common design patterns as best practices
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m 9s
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1. Best Practices: An Overview
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Best practices defined1m 1s
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When to use it1m 8s
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Getting the team to follow1m 10s
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2. Naming and Handling Classes
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Project setup overview1m 13s
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Set up the business layer2m 18s
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Running a unit test3m 13s
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Using constructors3m 9s
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Unit testing constructors4m 30s
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Namespaces2m 48s
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Static classes3m 10s
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Unit testing static classes4m 20s
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Using a singleton2m 6s
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3. Naming and Handling Methods, Fields, and Properties
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Method overloading5m 16s
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Unit testing with parameters2m 54s
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Method chaining4m 7s
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Using properties correctly2m 11s
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Using properties demo4m 29s
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Auto-implemented properties1m 33s
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4. Managing Objects Efficiently
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Initializing objects3m 54s
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Related objects needed once4m 19s
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Checking for null3m 6s
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5. More Best Practices Resources
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Conclusion
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Next steps37s
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Video: Using a singleton