The remote server returned an error: (400) Bad Request Microsoft.AspNet.Membership.OpenAuth
问题 I'm using Microsoft.AspNet.Membership.OpenAuth when I create a new asp.net webform .net 4.0 and I config AuthConfig.cs: OpenAuth.AuthenticationClients.AddFacebook( appId: "my appId", appSecret: "my appSecret"); In Facebook app config: Website with Facebook Login: http://www.tindep.com But when I login with facebook it's error: Server Error in '/' Application. The remote server returned an error: (400) Bad Request. Description: An unhandled exception occurred during the execution of the