Collect payments sdk，such as Alipay、WechatPay、UnionPay、LaCodPay(Pos) and so on，
Provide .Net/.NetCore
Now, Alipay for .net core middleware coding ...
支付类库会以中间件Nuget包的形式存在 项目中使用了IAppBuilder、IConfiguration、ILogger有以下依赖：
IAppBuilder：Install-Package Microsoft.AspNetCore.Http.Abstractions -Version 2.1.0
IConfiguration：Install-Package Microsoft.Extensions.Configuration.Abstractions -Version 2.1.0
ILogger：Install-Package Microsoft.Extensions.Logging -Version 2.1.0