我使用来自作者jamesmontemagno版本4.x的InAppBilling插件。(最后稳定)
遵循代码返回错误:Cannot convert from 'Plugin.InAppBilling。ItemType' to 'bool'
var connected = await billing.ConnectAsync(ItemType.InAppPurchase);
文档明确注明
改变:等待CrossInAppBilling.Current.ConnectAsync (ItemType.InAppPurchase);来等待CrossInAppBilling.Current.ConnectAsync ();