Tuesday, September 14, 2010
Yesterday, I got the error message “operation is not valid due to the current state of the object“ when I was adding web reference in my project. So, I decided to share with you.
There are several reasons
Is your web service running?
Something wrong in your URL
You have also put web service assembly into your server Global Assembly Cache.
Restart your IIS
If you have more solution, post here to share with us.