C# File Naming Conventions

This tutorial will explore C# file naming conventions, understand their importance, and delve into best practices you should adopt. I will explain a few best practices for file naming conventions in C# that focus on the specific coding style that is generally accepted within the industry.

File naming conventions refer to a set of rules that dictate how files should be named in a particular programming language. When you follow the proper file naming conventions in C#, you will get the following benefits:

  1. Readability: Makes it easier for others (or yourself in the future) to understand the structure and purpose of your code.
  2. Maintainability: Contributes to a codebase that is easier to debug and update.
  3. Collaboration: Aids in team environments where multiple people are working on the same project.

C# File Naming Rules

Here are some fundamental rules you should follow when naming your C# files:

  1. Use PascalCasing: Capitalize the first letter of each word in the filename. E.g., CustomerController.cs.
  2. Be Descriptive: Choose names that reflect the file’s purpose. E.g., OrderProcessing.cs rather than OP.cs.
  3. Avoid Abbreviations: Unless it’s a well-known acronym, don’t abbreviate. E.g., Configuration.cs over Config.cs.
  4. Keep It Short: While being descriptive, also aim to keep the file name as short as possible.


Let’s go through some examples to illustrate these rules.

  • Good Examples
    • EmployeeDetails.cs
    • PaymentGateway.cs
    • DataAccessLayer.cs
  • Bad Examples
    • ED.cs (Not descriptive)
    • payment_gateway.cs (Not using PascalCasing)
    • VeryLongAndComplicatedFileNameThatIsHardToRead.cs (Too long)

Best Practices for C# File Naming Conventions

Best PracticeDescriptionExample
Use PascalCasingCapitalize the first letter of each wordProductList.cs
Be DescriptiveThe name should reflect the file’s purposeEmailSender.cs
Avoid AbbreviationsUse full words unless the acronym is well-knownConfiguration.cs
Keep it ShortKeep the name as concise as possibleOrder.cs
Match Class and FilenameThe filename should match the name of the main class in the fileCustomer.cs
Use Suffix for Partial ClassesIf the file is a partial class, use a suffixCustomer.Logic.cs


In this tutorial, we learned how to follow the best practices for the C# file naming conventions. It not only aids in readability but also enhances maintainability and makes collaboration more manageable. To summarize, always use PascalCasing, be descriptive but concise, and avoid abbreviations unless they are universally understood while following naming conventions for files in C#.

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