c# - Uninstall EntityFramework using the Package Manager Console -

i'm trying re-install entityframework package using

pm> install-package entityframework 

but following message

'entityframework 5.0.0' installed. has reference 'entityframework 5.0.0'.

so tried uninstall package using

pm> uninstall-package entityframework -force 

but keep on getting following message

uninstall-package : unable find package 'entityframework'. @ line:1 char:1 + uninstall-package entityframework -force + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + categoryinfo          : notspecified: (:) [uninstall-package], invalidoperationexception 

how re-install package?

try deleting out of project references, , out of packages.config. re-add it.