Error in deployment step 'Activate Features'

Question

Every time I try to deploy my project (containing only one Event Receiver), I get the following error:

Error occurred in deployment step 'Activate Features': Operation is not valid due to the current state of the object.

I simply restart Visual Studio and Redeploy and it works. But I have to do this everytime I want to deploy. What could be causing this issue?

Answer 1

If you deploy a web part for a farm and you try to activate it from the feature it will not work because you need to activate it from a site, you cannot do it a deployment time and it will give you an error.