c# – LINQ’s Distinct() on a particular property

EDIT: This is now part of MoreLINQ.
What you need is a “distinct-by” effectively. I don’t believe it’s part of LINQ as it stands, although it’s fairly easy to write:

public static class EnumerableExtensions
public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> source, Func<TSource, TKey> keySelector)
HashSet<TKey> seenKeys = new HashSet<TKey>();
foreach (TSource element in source)
if (seenKeys.Add(keySelector(element)))
yield return element;

Source: c# – LINQ’s Distinct() on a particular property – Stack Overflow

white-space | CSS-Tricks

Here is a table to understand the behaviors of all the different values for property white-space:

New lines Spaces and tabs Text wrapping
normal Collapse Collapse Wrap
pre Preserve Preserve No wrap
nowrap Collapse Collapse No wrap
pre-wrap Preserve Preserve Wrap
pre-line Preserve Collapse Wrap

Source: white-space | CSS-Tricks

Visual Studio Comparison Tools – Visual Studio Marketplace

Visual Studio Comparison Tools is an extension for Visual Studio which uses external tools to compare files, folders and clipboard. Features: Comparing two files, selecting folders for comparison from the solution explorer and comparing (and merging) clipboard to a file or selected area in a file. By default uses Beyond Compare if found, then WinMerge (http://winmerge.org/) and if neither is found uses VSDiff to compare files. Tested to work with Beyond Compare 3 and 4.

Source: Visual Studio Comparison Tools – Visual Studio Marketplace

Angular state inspector – Chrome Extension

Helps you debug Angular component state. Supports Angular 1/2+/Ivy! Angular State Inspector for Angular Supports all versions of Angular: – AngularJs – Angular 2+ – Angular Ivy – Hybrid apps (AngularJs + Angular) Extends the Chrome Developer Tools for Angular web apps. Adds new panel “State” to Elements tab, that displays the state of selected element. Prints state of selected element in console by calling “$state” variable. Depending on angular version it can show: – Component state – Directives – Context, like ngForOf or ngIf values – Event listeners If they are applicable to the current element.

Angular State Inspector also allows you to modify the values in the “State” panel (double click on value)

Source: Angular state inspector – Chrome Web Store

CSS Peeper – Chrome Css Extension

Extract CSS and build beautiful styleguides. 🔎 No more digging in a code. Inspect styles in a simple, well-organized & beautiful way. Get it now! CSS Peeper is a CSS viewer tailored for Designers. Get access to the useful styles with our Chrome extension. Our mission is to let Designers focus on design, and spend as little time as possible digging in a code. Ever wondered what’s the line-height, font or a button size on a website? We provide you the ultimate tool to satisfy your curiosity. We enable you to inspect code in the easiest possible way. Check the hidden CSS style of objects, colors and assets on the web.

Source: CSS Peeper – Chrome Web Store

Making ASP.NET Core 3 web API return REST compliant Http return codes

To make an ASP.NET Web Api (core 3+) return valid Http status codes such as 200 OK, 400 Bad request and 404 Not found, use the IActionResult as return type.

Return code 422 can be used instead of 400, read more here: HTTP Status Codes For Invalid Data: 400 vs. 422

Code example C# web API controller “data” endpoint method:

/// <summary>
/// Get data from API
/// </summary>
/// <remarks>
/// GET: api/v1/data?id={id}
/// </remarks>
/// <returns><see cref="IActionResult"/> <see cref="Data"/>Data model</returns>
/// <response code="200">Serialized <see cref="Data"/></response>
/// <response code="400">Invalid id</response>
/// <response code="404">Found no match for id</response>
[ProducesResponseType(typeof(Data), 200)]
[ProducesResponseType(typeof(object), 400)]
[ProducesResponseType(typeof(object), 404)]
public IActionResult GetData(string id)
    var data = business.GetData(id);
    if (data == null)
        return NotFound(null); //404 not found
    if (data.IsValid)
        return Ok(data); //200 OK, found
        return BadRequest(data.ValidationErrorMessage); //400 bad reqeust validationerror

IActionResult type

The IActionResult return type is appropriate when multiple ActionResult return types are possible in an action. The ActionResult types represent various HTTP status codes. Any non-abstract class deriving from ActionResult qualifies as a valid return type. Some common return types in this category are BadRequestResult (400), NotFoundResult (404), and OkObjectResult (200). Alternatively, convenience methods in the ControllerBase class can be used to return ActionResult types from an action. For example, return BadRequest(); is a shorthand form of return new BadRequestResult();.

Because there are multiple return types and paths in this type of action, liberal use of the [ProducesResponseType] attribute is necessary. This attribute produces more descriptive response details for web API help pages generated by tools like Swagger[ProducesResponseType] indicates the known types and HTTP status codes to be returned by the action.

More info:
Controller action return types in ASP.NET Core web API | Microsoft Docs
HTTP Status Codes For Invalid Data: 400 vs. 422