The DbContext of type cannot be pooled because it does not have a single public constructor accepting a single parameter of type DbContextOptions

Question

I am trying to upgrade our current .Net Core application from 1.1 to 2.0 and am getting this runtime error: \"The DbContext of type \'CoreContext\' cannot be pooled because

Answer 1

This issue is mostly encountered when you "Scaffold-Dbcontext" and two constructors are generated.

Simple Solutions:

1. AddDbContextPool: If you want to use AddDbContextPool, remove your empty constructor and maintain the one with the DbContextOptionsBuilder. Note that in this case you might have to provide the options, as suggested in the previous posts.

2. AddDbContext: With AddDbContext, you can have both constructors/Overloads

Note: AddDbContextPool is preferred for performance reasons!