7 октября 2020

C# Naming Conventions / C# нотация

Today, I am going to explain C# coding standards naming conventions for best practice when you are developing a .NET application.

Terminology There are following three terminologies are used to declare C# and .NET naming standards. 

  • Camel Case (camelCase): In this standard, the first letter of the word always in small letter and after that each word starts with a capital letter.
  • Pascal Case (PascalCase): In this the first letter of every word is in capital letter.
  • Underscore Prefix (_underScore): For underscore ( __ ), the word after _ use camelCase terminology.

Kind of program block Rule how can C# and .NET naming
Private field_lowerCamelCase
Public fieldUpperCamelCase
Protected fieldUpperCamelCase
Internal fieldUpperCamelCase
Local variablelowerCamelCase

Native DataType

Always use native datatype instead of .NET CTS type. For example, use int instead of Int32 or Int64.

private int _salary = 100;  
private Int16 _salary = 100;  
private Int32 _salary=100;  


Always use PascalCase for class names. Try to use noun or noun phrase for class name. Do not give prefixes. Do not use underscores.

public partial class About : Page  


Always use PascalCase for method names. Use maximum 7 parameters in a method.

public string GetPosts(string postId)  

Note: Don’t use name as all character in CAPS.

Arguments and Local Variable

Always use camelCase with method arguments and local variables. Don’t use Hungarian notation for variables.

public string GetPosts(string postId  
   int numberOfPost = 0;   

Note: Don’t use abbreviations for any words and don’t use underscore ( _ ) in between any name.


Use PascalCase for property. Never use Get and Set as prefix with property name.

Note: Don’t use name with start with numeric character.


Always use letter “I” as prefix with name of interface. After letter I, use PascalCase.

public interface IUser  
   /// <summary>  
   /// Check user is exists or not  
   /// </summary>  
   /// <returns>return bool value</returns>  
   bool ValidateUser();  

Private Member Variable

Always try to use camelCase terminology prefix with underscore ( _ ).

private int _salary = 100; 

Public Member Variable

Always use PascalCase for public member variable

public int Salary = 100;  
PropertiesPascal Case, no underscores. Try to avoid abbreviations. Members must differ by more than case to be usable from case-Insensitive languages like Visual Basic .NET.
NamespacesPascal case for namespaces, no underscore and separate logical components with periods. Use Company Name. Technology Name as root. If you don’t have a company, use your domain name or your own initials. Note that any acronyms of three or more letters should be Pascal case (Xml instead of XML) instead of all caps. Do not use the same name for a namespace and a class.
AssembliesIf the assembly contains a single name space, or has an entire self-contained root namespace, name the assembly the same name as the namespace.
Classes and StructsPascal Case, no underscores or leading “C” or “ds”. Classes may begin with an “1” only ff the letter following the 1 is not capitalized; otherwise it looks like an Interface. Classes should not have the same name as the namespace in which they reside. Any acronyms of three or more letters should be Pascal case, not all caps. Try to avoid abbreviations, and try to always use nouns.
Collection ClassesFollow class naming conventions, but add Collection to the end of the name.
Delegate ClassesFollow class naming conventions, but add Delegate to the end of the name.
Exception ClassesFollow class naming conventions, but add Exception to the end of the name.
Attribute ClassesFollow class naming conventions, but add Attribute to the end of the name.
InterfacesFollow class naming conventions, but start the name with “I” and capitalize the letter following the “I”
EnumerationsFollow class naming conventions. Do not add “Enum” to the end of the enumeration name. If the enumeration represents a set of bitwise flags, end the name with a plural
Functions and SubsPascal Case, no underscores except in the event handlers. Try to avoid abbreviations.
ParametersCamel Case. Try to avoid abbreviations. Parameters must differ by more than case to be usable from case-Insensitive languages like Visual Basic .NET.
ConstantsSame naming conventions as pubSc/private member variables or procedure variables of the same scope. II exposed publicly from a class, use PascalCase. If private to a function/sub, use camelCase.

Member variable

Declare member variable at the top of the class, If class has static member then it will come at the top most and after that other member variable.

public class Account  
    public static string BankName;  
    public static decimal Reserves;  
    public string Number  
    public DateTime DateOpened  
    public DateTime DateClosed  
    public decimal Balance  
    // Constructor  
    public Account()  
        // ...  


Always use PascalCasing as default naming standard. 

  • Use a singular type name for an enumeration unless its values are bit fields.
  • Use a plural type name for an enumeration with bit fields as values, also called flags enum.
  • Do not use an “Enum” suffix in enum type names.
  • Do not use “Flag” or “Flags” suffixes in enum type names.
  • Do not use a prefix on enumeration value names.  
enum MailType  


Always use PascalCase for namespace.
namespace NextProgramming.Domain
Standard Abbreviation for Standard Controls.   

AbbreviationsStandard Control

Events Names   Events are associated with actions. Therefore, events are named with verbs. For example, Loaded, Clicked, and Printing.

  • Give events names with a concept of before, current, and after, using the present and past tenses. Depending on the page, window, control, or class, the event names for a page can be, Initialized, PreRender, Rendering, PostRender, and Exited. A button event can be OnClick.
  • Event handlers use “EventHandler” suffix, as shown in the following example:
  • public delegate void ClickedEventHandler(object sender, ClickedEventArgs e);
  • Use two parameters named sender and e in event handlers.
  • Name event argument classes with the “EventArgs” suffix. 

Fields Names   Use PascalCasing in field names. Do not use a prefix for field names. Do not use underscores in field names.   Naming a DLL or Assembly   Assemblies or DLLs are created for a major functionality such as a math library. The library name should be, CompanyName.Component.Dll. For example, Mindcracker.Math.dll and Mindcracker.Data.dll.   Naming Parameters   Use camelCasing and descriptive parameter names. Use names based on a parameter’s meaning rather than the parameter’s type.    Naming Resources Use PascalCasing and descriptive names in resource keys. Use only alphanumeric characters and underscores in naming resources.  Summary   Today we learned coding standard naming conventions in C#. Thanks for reading this article, hope you enjoyed it.

Source: https://www.c-sharpcorner.com/

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Опубликовано 7 октября, 2020 Кирилл в категории "C#", "Учёба