Adds specified cookies to the upload request.
Use the AddCookie() method to avoid this problem. What you need is to pass to this method cookie name-value pairs separated with semicolons:
It is more convenient to use this method in the BeforeUpload event handler as it shown in the following sample. Note, this sample is for ASP.NET only.
Although you can send traditional cookies this way, you should use it solely for HTTP-only cookies.
Use the ResetCookies() method to remove cookies previously added by the AddCookie() method.