Send WhatsApp sms from c#

Hello Everyone,
I have downloaded this whatsApp Api
Whatsapp API for .NET 15.1.9
But I don't know how to use this API to send Message to others
I tried the following code but it is throwing exception
WhatsAppApi.WhatsApp objwa = new WhatsAppApi.WhatsApp("+923422352158", "123456789012345", "Taqi",true);
objwa.OnError += new WhatsAppApi.WhatsEventBase.OnErrorDelegate(objwa_OnError);
objwa.OnConnectFailed += new WhatsAppApi.WhatsEventBase.ExceptionDelegate(objwa_OnConnectFailed);
objwa.Connect();
objwa.Login();
The Above code throw exception
Invalid length for a Base-64 char array.
Any help will be appreciated.
Thanks
www.techgulf.blogspot.com

Any questions you may have about the third-party Whatsapp API for .NET should not be asked in these forums as they are intended for Microsoft's products and technologies only.
You may ask your question somewhere on the project site or ask the owners directly if you have a question or issue regarding this API:
https://www.nuget.org/packages/WhatsAppAPI/
Please remember to close your threads by marking helpful posts as answer.

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Send WhatsApp sms from c#

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