c# - What is the proper way of using dbContext along with Repositories and Services -

i discovered used dbcontext badly.

i tried have single instance of dbcontext per app , injected dbservcies , next repositories.

var context = new dbentities(); simpleioc.default.register<ipaymentlogservice>(() => new paymentlogservice(context));   public paymentlogservice(installmentsentities context) {         _context = context;         _paymentlogrepository = new paymentlogrepository(context); } 

i have repository created follows:

public paymentlogrepository(dbentities context) {         _context = context; } 

when adding row via entity framework this:

public int add(paymentlog entity) {     _context.paymentlogs.add(entity);     var affectedrows = _context.savechanges();      return numberofaddeditems; } 

my _context existed whole time new pending changes done e.g via setter therefore got additional updates in database.

what pattern of using dbcontext.

should instantiated per method/action, or per service/repository?