.NET client for the VIES - European Commission - VAT validation service
Package Manager:
Install-Package ES.FX.Vies
.NET CLI:
dotnet add package ES.FX.Vies
Checking a VAT number using the VIES service
var vatService = new VatCheckService();
var result = await vatService.CheckAsync(new VatCheckRequest {CountryCode = "RO", VatNumber = "1234567"});
Additional documentation may be found in the Project Wiki