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Posted 20 Sep 2010

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Some Best Practices for C# Application Development

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17 Oct 2010CPOL3 min read
Some C# best coding practices that I learnt over the last few years

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Few days ago, in one my earlier posts, I discussed about “Some Best Practices for Silverlight Application Development (XAML)” which got a huge hit by my readers. I got a lot of feedback on that too. Someone from the community also suggested that I write some best coding practices on C#. This struck in my mind and hence I decided to write some best practices about C# coding here from my past few years of experience.

For the past few years, I learned a lot and tried to share the best of my knowledge with others who are new in the software development field. I contribute this post to those fellow members. Hope I will get more feedback and/or suggestions here too.

I liked C# programming when I started with .NET technology. I never tried to write code in VB.NET as I decided my career on that. When I was new to this field, I made a lot of mistakes and from those mistakes, I learnt more things. There’s a proverb: “Mistakes make you learn more & more…”. My career was one of them. Also there’s a proverb: “There’s no end to learning in life. Each second, a person can learn”. So, if there are any more suggestions, please share those with me. It will help me and others to learn more in a proper way.

One second, there are various posts available on the internet regarding the same topic. If you do a Google, you will get a number of them. But these collections are based on my experiences, those I learnt and thought of sharing.

Let’s stop here and start discussing the Best Coding Practices of C# application development. Here are some of them:

  • Use proper Naming Conventions
    • Always use Camel or Pascal naming format
    • Avoid all uppercase or lowercase names
    • Never use a name which begins with numeric character
    • Always prefer meaningful names for your class, property, method, etc.
    • Never build different names varied by capitalization
    • Don’t use the same name used in .NET Framework
    • Avoid adding prefixes or suffixes for your identifiers
    • Always use “I” as prefix for Interfaces
    • Always add “Exception” as suffix for your custom exception class
    • Never prefix or suffix the class name to its property name
    • Prefix “Is”, “Has” or “Can” for boolean properties
    • Don’t add prefix for your controls
  • Decide between Value Types and Reference Types
  • Always Use Properties instead of public variables
  • Use Nullable data types whenever required
  • Prefer Runtime Constants over Compile time Constants
  • Prefer “is” and “as” operators while casting
  • Prefer string.Format() or StringBuilder for string concatenation
  • Use Conditional attributes when you need them
  • Use ‘0’ (zero) as default value enum value types
  • Chose between Equals() and Equal (==) operator
  • Always prefer the foreach(…) loop
  • Initialize member variables at the time of assignment
  • Initialize static member variables with static constructors
  • Use constructor chaining whenever possible
  • Minimize boxing & unboxing of objects
  • Properly utilize try/catch/finally blocks
  • Catch only that Exception which you can handle
  • Use IDisposable interface
  • Utilize LazyInitializer in most of the cases
  • Split your logic in several small and simple methods
  • Try to use Patterns & Practices like MVP/MVC/MVVM
  • Always prefer DataBinding to populate values in the UI

Explanation

You can read the explanation in this article.

History

  • 20th September, 2010 - Initial post
  • 17th October, 2010 - Explanation of points

Explanation of those points are published as an article. Read it here.

 

I would appreciate some more points if you have any to include in this article.


License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Kunal Chowdhury «IN»
Technical Lead
India India

Kunal Chowdhury is a former Microsoft "Windows Platform Development" MVP (Most Valuable Professional, 2010 - 2018), a Codeproject Mentor, Speaker in various Microsoft events, Author, passionate Blogger and a Senior Technical Lead by profession.

He is currently working in an MNC located in India. He has a very good skill over XAML, C#, Silverlight, Windows Phone, WPF and Windows app development. He posts his findings, articles, tutorials in his technical blog (www.kunal-chowdhury.com) and CodeProject.


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Comments and Discussions

 
GeneralMy vote of 4 Pin
Aamer Alduais8-May-12 19:14
MemberAamer Alduais8-May-12 19:14 
SuggestionFew Missed out Pin
zenwalker198527-Oct-11 7:05
Memberzenwalker198527-Oct-11 7:05 
GeneralRe: Few Missed out Pin
thatraja26-Nov-11 23:01
professionalthatraja26-Nov-11 23:01 
GeneralRe: Few Missed out Pin
zenwalker198527-Nov-11 2:17
Memberzenwalker198527-Nov-11 2:17 
GeneralRe: Few Missed out Pin
Kunal Chowdhury «IN»27-Nov-11 2:35
professionalKunal Chowdhury «IN»27-Nov-11 2:35 
GeneralRe: Few Missed out Pin
zenwalker198527-Nov-11 5:20
Memberzenwalker198527-Nov-11 5:20 
QuestionNot a convention... Pin
lewax0030-Sep-11 10:38
Memberlewax0030-Sep-11 10:38 
GeneralMy vote of 2 Pin
Mukesh.C.Gupta21-Oct-10 23:18
MemberMukesh.C.Gupta21-Oct-10 23:18 
GeneralSome Best Practices for C# Application Development Pin
ananda_SriLanka19-Oct-10 9:10
Memberananda_SriLanka19-Oct-10 9:10 
GeneralMy vote of 4 Pin
RajanCRT18-Oct-10 20:08
MemberRajanCRT18-Oct-10 20:08 
GeneralSome Best Practices for C# Application Development Pin
ananda_SriLanka18-Oct-10 19:17
Memberananda_SriLanka18-Oct-10 19:17 
GeneralRe: Some Best Practices for C# Application Development Pin
Kunal Chowdhury «IN»19-Oct-10 6:22
professionalKunal Chowdhury «IN»19-Oct-10 6:22 
GeneralMy vote of 2 Pin
Bernhard Hofmann18-Oct-10 9:39
MemberBernhard Hofmann18-Oct-10 9:39 
AnswerRe: My vote of 2 Pin
Kunal Chowdhury «IN»18-Oct-10 18:27
professionalKunal Chowdhury «IN»18-Oct-10 18:27 
GeneralI hate these kind of lists (no offense intended) PinPopular
Jason Christian18-Oct-10 8:10
MemberJason Christian18-Oct-10 8:10 
AnswerRe: I hate these kind of lists (no offense intended) - Already Published the Explanation Pin
Kunal Chowdhury «IN»18-Oct-10 8:17
professionalKunal Chowdhury «IN»18-Oct-10 8:17 
QuestionPrefer Runtime Constants over Compile time Constants - Why? Pin
bennybechp10-Oct-10 20:45
Memberbennybechp10-Oct-10 20:45 
AnswerRe: Prefer Runtime Constants over Compile time Constants - Why? Pin
Kunal Chowdhury «IN»17-Oct-10 3:38
professionalKunal Chowdhury «IN»17-Oct-10 3:38 
GeneralMy vote of 5 Pin
Narud Shiro5-Oct-10 2:21
MemberNarud Shiro5-Oct-10 2:21 
AnswerRe: My vote of 5 Pin
Kunal Chowdhury «IN»17-Oct-10 3:40
professionalKunal Chowdhury «IN»17-Oct-10 3:40 
GeneralGood advises! Pin
Thornik1-Oct-10 2:00
MemberThornik1-Oct-10 2:00 
GeneralRe: Good advises! Pin
Kunal Chowdhury «IN»17-Oct-10 3:41
professionalKunal Chowdhury «IN»17-Oct-10 3:41 
GeneralMy vote of 4 Pin
Owen Blacker29-Sep-10 2:31
MemberOwen Blacker29-Sep-10 2:31 
GeneralRe: My vote of 4 Pin
Kunal Chowdhury «IN»29-Sep-10 4:57
professionalKunal Chowdhury «IN»29-Sep-10 4:57 
GeneralRe: My vote of 4 Pin
Kunal Chowdhury «IN»17-Oct-10 3:42
professionalKunal Chowdhury «IN»17-Oct-10 3:42 

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