Response for preflight has invalid HTTP status code 405

Question

I have read many similar problems in StackOverflow, but the solutions doesn\'t work for me.

I have WCF REST service:

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Answer 1

Solution that worked for me:

1. Add this to web.config (server-side):

2. Create a Global.asax file (Global application class) and add the following code:

       protected void Application_BeginRequest(object sender, EventArgs e){
           if (Request.Headers.AllKeys.Contains("Origin") && Request.HttpMethod == "OPTIONS")
               {
                   Response.Flush();
               }
       }