This solution contains two assemblies with the same name, or the SharePoint server already has an assembly with the specified name.

While trying to redeploy the same WebPart ,I was facing this rather silly error. I tried to do the “cleanup” by right clicking the Project and then redeployed same error appeared. Later figured it out by throwing a search in Google



#1 See if the feature that you're trying to add still exists in the "\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\FEATURES" path. Delete it.


#2 Uninstall the particular Assembly from c:\windows\assembly folder too.


#3 Try to deploy it again.