remarkable VS FluentValidation

> we can't take some well-tested, used-by-millions library

You can.

Here is an example of Sciter application that uses RemarkableJS library (https://github.com/jonschlinkert/remarkable) as it is:

https://quark.sciter.com/quark-application-samples/hello-mar...

Since then they've made things that are IMO quite useful, like enquirer, micromatch, and remarkable.

mdview (sources) uses RemarkableJS for MD->HTML conversion.

will give you split-view out-of-the-box. But web dev's will start looking for frameworks in order to achieve this simple task that browser have internally already.

TL;DR: Web and desktop UIs use inherently different models. You can share parts between these two different platforms but only parts, really.

[1] Remarkable JS: https://github.com/jonschlinkert/remarkable

Here is an example of Command handler with built-in Fluent Validation and fire and forget style:

There is an RFC called Problem Details (RFC7807) that standardizes how an error in an API should be responded to for the client. If you use Fluent validation, you may have noticed that the response is within this pattern.

here we're defining the input validation requirements using fluent validation rules. let's see what happens when the user input doesn't meet the above criteria. execute the same request in swagger with the following incorrect json content:

I remember FluentValidation being a nice library for this type of stuff.

Literally the code example in the front page: https://fluentvalidation.net/

https://www.nuget.org/packages/Newtonsoft.Json/ https://www.nuget.org/packages/AutoMapper/ https://www.nuget.org/packages/Dapper/ https://www.nuget.org/packages/FluentValidation/ https://www.nuget.org/packages/FluentAssertions/ https://www.nuget.org/packages/NUnit/ https://www.nuget.org/packages/xunit/ https://www.nuget.org/packages/YamlDotNet/ https://www.nuget.org/packages/Moq/ That is simply not true. Mature c# projects purposely maintain no downstream dependencies and is they do, it's to a major reputable lib. See for yourself - these are staple third party packages commonly used. Anything dependency starting with System or NETStandard is Microsoft maintained.

FluentValidator for validating and authorising certain fields.

Now that we know the importance of providing users with enough information about their requests and how it was processed, let’s focus on how we can configure our API to help us do that.One aspect of such meaningful experience is Request Validation (400 Error Range). For that purpose I am using a library called Fluent Validation.