How to check EU VAT using VIES SOAP service in C#

Question

I have an ASP.NET website that needs to check a user-supplied VAT. The VIES Service can be used for that which exposes a SOAP API.

I need a dead-simple example on how to validate a VAT using this service. In PHP, it's these 4 lines: https://stackoverflow.com/a/14340495. For C#, I have found some articles from 2010 that do not work or are tens or even hundreds lines of "wrappers", "helper services" etc.

I don't need any of that, can someone provide PHP-like four-liner that would check VAT in C#? Thank you.

Answer 1

Updated: I've published this as a NuGet library.

https://github.com/TriggerMe/CSharpVatChecker

var vatQuery = new VATQuery();
var vatResult = await vatQuery.CheckVATNumberAsync("IE", "3041081MH"); // The Squarespace VAT Number

Console.WriteLine(vatResult.Valid); // Is the VAT Number valid?
Console.WriteLine(vatResult.Name);  // Name of the organisation