Internal Server Error - Sending Multiple Fax C# .NET

Can you make any other API calls successful? For example, calling the extension info endpoint.

I'm wondering if this is an issue with the PDF file itself.

Can you try the example PDF file here (click the "Download"):

https://github.com/grokify/go-ringcentral/blob/master/examples/fax_send/test_file.pdf

If that works, can you provide an example PDF that is failing. If so, join our Glip team here:

https://glipped.herokuapp.com/

Hi, please use our offical C# SDK: https://github.com/ringcentral/ringcentral-csharp-client

It is super simple to send multiple files via Fax: https://github.com/ringcentral/ringcentral-csharp-client/blob/master/RingCentral.Test/FaxTest.cs

Still we are having a issue.
Because we are having Visual Studio 2015 and Framework 4 used in our application.

1. We tried to install Ringcentral.Client from Nuget, we received the below message.

"Severity Code Description Project File Line Suppression State
Error  Could not install package 'Flurl.Http 2.1.1'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.0', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.  "

Please find attachment.



2. Also We have tried to install RingCentralSDK from Nuget and it is installed successfully. But After installed we tried to build our application, it is showing the following error.

Please find attachment.


So I request you that please provide us the source code which is support for .net framework 4.

We just wanted to use Fax API only to send multiple attachment and retrieve response only.

Thanks for your help.