.NET Snippets for Visual Studio Code

⚠️ Disclaimer ⚠️

This is not the official Visual Studio Code or Microsoft extension. This is a community-created extension that provides C#, ASP.NET Core, and Razor/Blazor snippets to enhance your development workflow.

A comprehensive collection of code snippets for .NET development in Visual Studio Code, covering C#, ASP.NET Core, and Razor/Blazor development.

Features

C# Snippets (`csharp.json`)

Essentials
- main - Entry point for a console app
- class - Class definition with namespace
- ctor - Constructor with parameters
- prop - Auto-implemented property
- propfull - Full property with backing field
- method - Method with XML documentation
- async - Async method with error handling
- try - Try-catch block with logging
Testing
- test - Test class with setup
- testm - Test method with arrange/act/assert
- mock - Mock setup with verification
Logging & Configuration
- log - Logging statement with level
- config - Configuration access with fallback

ASP.NET Core Snippets (`aspnet.json`)

API Development
- controller - API controller with logging
- get - HTTP GET endpoint with error handling
- post - HTTP POST endpoint with error handling
- put - HTTP PUT endpoint with error handling
- delete - HTTP DELETE endpoint with error handling
- route - Route attribute with template
- inject - Dependency injection with logging
Middleware & Configuration
- middleware - Custom middleware with next delegate
- appconfig - Application configuration setup
- dbcontext - DbContext with repository pattern

Razor/Blazor Snippets (`razor.json`)

Razor Pages
- page - Razor page with model and title
- razorlayout - Layout with Bootstrap and scripts
- section - Define a Razor section
- partial - Include a partial view with model
Blazor Components
- component - Component with parameter and initialization
- code - Code block with initialization
- form - Form with validation and styling
- bind - Input with validation
- razorinject - Service injection in component
Razor Syntax
- rfor - Foreach loop with HTML structure
- rif - Conditional rendering
- rswitch - Switch statement for rendering

Usage

Install the extension in VS Code
Open a .NET file (.cs, .cshtml, or .razor)
Type the snippet prefix and press Tab or Enter
Use Tab to navigate between placeholders

Below are tables for every snippet (from aspnet.json, csharp.json, and razor.json) with their prefix, description, output, and tab stops.

ASP.NET Core Snippets (aspnet.json)

Prefix	Description	Output	Tab stops
for	C# for loop	for (int i = 0; i < length; i++) { ... }	$1 (i), $2 (length), $0 (final cursor)
foreach	C# foreach loop	foreach (var item in collection) { ... }	$1 (item), $2 (collection), $0 (final cursor)
if	If statement	if (condition) { ... }	$1 (condition), $0 (final cursor)
try	Try-catch block	try { ... } catch (Exception ex) { ... }	$0 (final cursor), $1 (Exception)
main	Main method for console app	public static void Main(string[] args) { ... }	$0 (final cursor)
class	Basic class definition	public class ClassName { ... }	$1 (ClassName), $0 (final cursor)
prop	Auto-implemented property	public string PropertyName { get; set; }	$1 (string), $2 (PropertyName)
ctor	Constructor for a class	public ClassName() { ... }	$1 (ClassName), $0 (final cursor)
async	Async method definition	public async Task MethodNameAsync() { ... }	$1 (MethodName), $0 (final cursor)
linq	LINQ query expression	var result = from item in collection where item.Property == value select item;	$1 (item), $2 (collection), $3 (Property), $4 (value)
controller	ASP.NET Core API controller with logging	[ApiController] [Route("api/[controller]")] public class ControllerNameController : ControllerBase { ... }	$1 (Namespace), $2 (ControllerName), $0 (final cursor)
get	HTTP GET endpoint with error handling	[HttpGet("route")] public async Task<ActionResult> GetName(parameters) { ... }	$1 (route), $2 (ReturnType), $3 (Name), $4 (parameters), $0 (final cursor)
post	HTTP POST endpoint with error handling	[HttpPost("route")] public async Task<ActionResult> PostName([FromBody] ModelType model) { ... }	$1 (route), $2 (ReturnType), $3 (Name), $4 (ModelType), $0 (final cursor)
inject	Constructor-based dependency injection	private readonly IServiceType _serviceName; public ClassName(IServiceType serviceName) { ... }	$1 (IServiceType), $2 (serviceName), $3 (ClassName)
dbcontext	Entity Framework DbContext class	public class AppDbContext : DbContext { public AppDbContext(DbContextOptions options) : base(options) {} public DbSet Entities { get; set; } }	$1 (AppDbContext), $2 (Entity)
dbset	EF Core DbSet property	public DbSet Entities { get; set; }	$1 (Entity)
page	Razor page route directive	@page "/route"	$1 (route)
code	Code block in Razor	@code { ... }	$0 (final cursor)
rfor	foreach loop in Razor	@foreach (var item in collection) { @item }	$1 (item), $2 (collection), $0 (final cursor)
razorinject	Inject service in Razor	@inject IMyService MyService	$1 (IMyService), $2 (MyService)
form	Blazor EditForm with validation	...	$1 (model), $2 (HandleValidSubmit), $3 (Property), $0 (final cursor)
logger	Inject ILogger for logging	private readonly ILogger _logger; public ClassName(ILogger logger) { ... }	$1 (ClassName)
route	Route mapping for controller/action	[Route("api/[controller]")] [ApiController]	$1 (api/[controller])
returnok	Returns Ok response	return Ok(new { property = value });	$1 (property), $2 (value)
middleware	Custom middleware with logging	public class MiddlewareNameMiddleware { ... }	$1 (MiddlewareName), $0 (final cursor)
service	Create a new service interface and implementation	public interface IServiceNameService { ... } public class ServiceNameService : IServiceNameService { ... }	$1 (ServiceName), $0 (final cursor)

C# Snippets (csharp.json)

Prefix	Description	Output	Tab stops
main	Entry point for a console app	public static void Main(string[] args) { ... }	$0 (final cursor)
class	Basic class definition	public class ClassName { ... }	$1 (ClassName), $0 (final cursor)
ctor	Constructor for a class	public ClassName(parameters) { ... }	$1 (ClassName), $2 (parameters), $0 (final cursor)
prop	Auto-implemented property	public type PropertyName { get; set; }	$1 (type), $2 (PropertyName)
for	Standard for loop	for (int i = 0; i < count; i++) { ... }	$1 (i), $2 (count), $0 (final cursor)
foreach	Iterates through a collection	foreach (var item in collection) { ... }	$1 (item), $2 (collection), $0 (final cursor)
if	Basic conditional	if (condition) { ... }	$1 (condition), $0 (final cursor)
switch	Switch-case logic	switch (expression) { case value: ... break; default: break; }	$1 (expression), $2 (value), $0 (final cursor)
try	Error handling with logging	try { ... } catch (Exception ex) { ... }	$1 (try block), $2 (Exception), $0 (final cursor)
async	Async method with Task return	public async Task MethodNameAsync(parameters) { ... }	$1 (returnType), $2 (MethodName), $3 (parameters), $0 (final cursor)
linq	LINQ query expression	var result = from item in collection where condition select item;	$1 (item), $2 (collection), $3 (condition)
dbcontext	Entity Framework DbContext class	public class DbContextName : DbContext { ... }	$1 (DbContextName), $0 (final cursor)
dbset	EF Core DbSet property	public DbSet EntityNames { get; set; }	$1 (EntityType), $2 (EntityName)
testclass	xUnit/NUnit test class	public class TestClassNameTests { ... }	$1 (TestClassName), $2 (TestedClass), $3 (sut), $0 (final cursor)
testmethod	Unit test method with AAA pattern	[Fact] public async Task MethodName_Scenario_ExpectedResult() { ... }	$1 (MethodName), $2 (Scenario), $3 (ExpectedResult), $4 (arrange), $5 (sut), $6 (parameters), $0 (final cursor)
asserteq	Assert.Equal() usage	Assert.Equal(expected, actual);	$1 (expected), $2 (actual)
logger	Inject and use ILogger	private readonly ILogger _logger; public ClassName(ILogger logger) { ... }	$1 (ClassName)
config	Access config from IConfiguration	private readonly IConfiguration _configuration; public ClassName(IConfiguration configuration) { ... } var value = _configuration["Section:Key"];	$1 (ClassName), $2 (Section:Key)
nullcheck	Safe null check template	if (variable == null) { throw new ArgumentNullException(nameof(variable)); }	$1 (variable)

Razor/Blazor Snippets (razor.json)

Prefix	Description	Output	Tab stops
for	C# for loop	for (int i = 0; i < length; i++) { ... }	$1 (i), $2 (length), $0 (final cursor)
foreach	C# foreach loop	foreach (var item in collection) { ... }	$1 (item), $2 (collection), $0 (final cursor)
if	If statement	if (condition) { ... }	$1 (condition), $0 (final cursor)
try	Try-catch block	try { ... } catch (Exception ex) { ... }	$0 (final cursor), $1 (Exception)
main	Main method for console app	public static void Main(string[] args) { ... }	$0 (final cursor)
class	Basic class definition	public class ClassName { ... }	$1 (ClassName), $0 (final cursor)
prop	Auto-implemented property	public string PropertyName { get; set; }	$1 (string), $2 (PropertyName)
ctor	Constructor for a class	public ClassName() { ... }	$1 (ClassName), $0 (final cursor)
async	Async method definition	public async Task MethodNameAsync() { ... }	$1 (MethodName), $0 (final cursor)
linq	LINQ query expression	var result = from item in collection where item.Property == value select item;	$1 (item), $2 (collection), $3 (Property), $4 (value)
controller	ASP.NET Core API controller	[ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { ... }	$1 (MyController), $0 (final cursor)
get	HTTP GET endpoint	[HttpGet] public IActionResult GetSomething() { return Ok(data); }	$1 (GetSomething), $2 (data)
post	HTTP POST endpoint	[HttpPost] public IActionResult PostSomething([FromBody] Model model) { return CreatedAtAction(nameof(GetSomething), new { id = model.Id }, model); }	$1 (PostSomething), $2 (Model), $3 (GetSomething)
inject	Constructor-based dependency injection	private readonly IMyService _service; public ClassName(IMyService service) { ... }	$1 (IMyService), $2 (service), $3 (ClassName)
dbcontext	Entity Framework DbContext class	public class AppDbContext : DbContext { public AppDbContext(DbContextOptions options) : base(options) {} public DbSet Entities { get; set; } }	$1 (AppDbContext), $2 (Entity)
dbset	EF Core DbSet property	public DbSet Entities { get; set; }	$1 (Entity)
page	Razor page route directive	@page "/route"	$1 (route)
code	Code block in Razor	@code { ... }	$0 (final cursor)
rfor	foreach loop in Razor	@foreach (var item in collection) { @item }	$1 (item), $2 (collection), $0 (final cursor)
razorinject	Inject service in Razor	@inject IMyService MyService	$1 (IMyService), $2 (MyService)
form	Blazor EditForm with validation	...	$1 (model), $2 (HandleValidSubmit), $3 (Property), $0 (final cursor)
logger	Inject ILogger for logging	private readonly ILogger _logger; public ClassName(ILogger logger) { ... }	$1 (ClassName)
page (Razor Page)	Razor page with model and title	@page @model Namespace.PageModel @{ ViewData["Title"] = "Page Title"; } @ViewData["Title"] ...	$1 (Namespace), $2 (PageModel), $3 (Page Title), $0 (final cursor)
code (Blazor code block)	Blazor code block with initialization	@code { private type variable; protected override async Task OnInitializedAsync() { ... } }	$1 (type), $2 (variable), $0 (final cursor)
rfor (Razor Loop)	Razor foreach loop with HTML structure	@foreach (var item in collection) { @item.Property }	$1 (item), $2 (collection), $3 (class), $4 (Property)
component	Blazor component with parameter and initialization	@page "/route" ComponentName ... @code { [Parameter] public type ParameterName { get; set; } protected override async Task OnInitializedAsync() { ... } }	$1 (route), $2 (ComponentName), $3 (class), $4 (type), $5 (ParameterName), $0 (final cursor)
form (Blazor Form)	Blazor form with validation and styling	... @code { private ModelType model = new(); private async Task HandleValidSubmit() { ... } }	$1 (model), $2 (HandleValidSubmit), $3 (Property), $4 (Label), $5 (ModelType), $0 (final cursor)
bind	Blazor input with validation	<InputText @bind-Value="@model.Property" class="form-control" />	$1 (model), $2 (Property)
razorinject (Inject Service)	Inject service in Blazor component	@inject IServiceType ServiceName @code { // Use ServiceName in your component ... }	$1 (IServiceType), $2 (ServiceName), $0 (final cursor)
razorlayout	Razor layout with Bootstrap and scripts	... @ViewData["Title"] - ApplicationName ... ... @RenderBody() ... ...	$1 (ApplicationName), $2 (header), $3 (footer)
section	Define a Razor section	@section SectionName { ... }	$1 (SectionName), $0 (final cursor)
partial	Include a partial view with model	@await Html.PartialAsync("_PartialName", model)	$1 (PartialName), $2 (model)
input	Create a Razor input field		$1 (Property)

Requirements

Visual Studio Code 1.60.0 or higher
.NET SDK 6.0 or higher

Version History

See CHANGELOG.md for a detailed list of changes and version history.

License

MIT License - see LICENSE file for details

.NET Snippets SP

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