There is a (non-Microsoft) NuGet package that allows upgrading the Mvc3 to Mvc4. There is a (Microsoft) article that explains how to manually migrate from Mvc3
icmp
conditional-aggregation
svncommit
android-recyclerview
google-authentication
xmeans
checkin-policy
mclapply
wagon
webfaction
tss.msr
relational-algebra
messagebox
s-function
anchorjs
nodemon
favicon
consul-kv
numeric
sql-returning
gradle-ssh-plugin
app-code
django-auth-ldap
bias-neuron
jsdelivr
kafka-transactions-api
custom-ui
h.264
scrapy-middleware
spring-cloud-kubernetes