[Memo] Points to note when upgrading EntityFramework 6 to EntityFrameworkCore

    I am upgrading a .net framework 4.5 project to .net core 2.1, which uses EF6 and has undergone some modifications:

1. Changes in the namespace can basically be supplemented by automatic prompts, and there is no need to memorize them.
2. The return result of DbQuery<T> is changed to: IQueryable<T>.
3. The Include method already supports incoming types, so extensions are no longer required.
4. DbContext.Configuration.AutoDetectChangesEnabled property moved to: DbContext.ChangeTracker.AutoDetectChangesEnabled.
5. In a custom class that inherits from DbContext, the connection string can be defined using the OnConfiguring override method, such as:

       public  partial  class SenparcEntities: DbContext
       {
           ///  <summary> 
           /// Connection String
            ///  </summary> 
           internal  string ConnectionString { get ; set ; }
   
   
           public DbSet<Account> Accounts { get; set; }
           public DbSet<SystemConfig> SystemConfigs { get; set; }
   
           public SenparcEntities(string connectionString)
           {
               ConnectionString = connectionString;
           }
   
           protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
           {
               // Configure the connection string 
               optionsBuilder.UseSqlServer(ConnectionString);
   
               base.OnConfiguring(optionsBuilder);
           }
       }