https://danielk.tech/home/net-core-api-server-how-to-create-a-base-crud-controller

BaseControllerDBContext.cs

using Microsoft.EntityFrameworkCore;

namespace BaseController
{
    public class BaseControllerDBContext : DbContext
    {
        public DbSet<WeatherForecast> WeatherForecasts { get; set; }
        public BaseControllerDBContext(DbContextOptions<BaseControllerDBContext> options) : base(options)
        {

        }
    }
}