BuildManager.AddReferencedAssembly in NetCORE

I have 2 web api project with net core. 1.- Base web api. 2.- Contact web api.

I can load contact web api dynamically from base web api. but entities and layers assemblies are not loaded. For contacts web api to work, I must add the reference manually entities and layers assemblies in base web api. In NET Framework I use BuildManager.AddReferencedAssembly, but in net core don't exist. How can I add a dynamic reference with net core?. Thanks.