9pay NinePay.SDK.DotNet by: 9pay .NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. 339 total downloads last updated 4/8/2026 Latest version: 1.0.1 9pay payment gateway vietnam sdk payment-gateway fintech Official .NET SDK for 9PAY Payment Gateway. Create payment requests, query transaction status, and verify webhook/callback data.