Yedda C# Twitter Update Results in 417 Expectation failed error

Symptom:

You are trying to call UpdateAsXML or UpdateAsJSON functions in the Yedda C# Twitter wrapper but when you try that the following response is sent back.

Error: 417 “Expectation Failed.” 

Fix:

Find ExcecutePostCommand() function in the Yedda C# Twitter class. Add the part in red as below.

protected string ExecutePostCommand(string url, string userName, string password, string data) {

WebRequest request = WebRequest.Create(url);

        System.Net.ServicePointManager.Expect100Continue = false;