Wilson,

It sounds like you might have a versioning problem. Check in the component's assembly config file to see if you are increasing the version everytime you build. If so, change it to stay consistent and see if that fixes the problem.

>Thanks.
>
>Sometimes i have found with this.
>
>if i make a control in a class library and i add this project reference to my application and place the control in a form, if i build again the class library, the control desappear.
>
>What should i do to avoid this.