c# - How to avoid assembly compilation before application start -

i want use entity-framework database first in application. problem is, database schema using not static , can customized in cases (if customer needs more tables store individual information). idea was, automatically generate assembly, contains ef dbcontext whith roslyn, explained in article. think not handy solution, because have compile assembly , needs load form directory, executing user has read , write access (like appdata, ...). there better solution problem? because want avoid compiling assembly dynamically.

edit think needs assembly, because not customized product should use same assembly using entity-framework. (i hope makes sense).