removed Task<Exception> method signature, using try catch for AggregateException for Task.WhenAll(..)
removed Task<Exception> method signature, using try catch for AggregateException for Task.WhenAll(..)

aspnetboilerplate/aspnetboilerplate,verdentk/aspnetboilerplate,ilyhacker/aspnetboilerplate,ilyhacker/aspnetboilerplate,AlexGeller/aspnetboilerplate,fengyeju/aspnetboilerplate,verdentk/aspnetboilerplate,carldai0106/aspnetboilerplate,Nongzhsh/aspnetboilerplate,andmattia/aspnetboilerplate,zclmoon/aspnetboilerplate,andmattia/aspnetboilerplate,Nongzhsh/aspnetboilerplate,AlexGeller/aspnetboilerplate,andmattia/aspnetboilerplate,ryancyq/aspnetboilerplate,zclmoon/aspnetboilerplate,ryancyq/aspnetboilerplate,beratcarsi/aspnetboilerplate,verdentk/aspnetboilerplate,luchaoshuai/aspnetboilerplate,aspnetboilerplate/aspnetboilerplate,aspnetboilerplate/aspnetboilerplate,beratcarsi/aspnetboilerplate,carldai0106/aspnetboilerplate,ilyhacker/aspnetboilerplate,fengyeju/aspnetboilerplate,Nongzhsh/aspnetboilerplate,ryancyq/aspnetboilerplate,virtualcca/aspnetboilerplate,AlexGeller/aspnetboilerplate,beratcarsi/aspnetboilerplate,luchaoshuai/aspnetboilerplate,ryancyq/aspnetboilerplate,zclmoon/aspnetboilerplate,carldai0106/aspnetboilerplate,virtualcca/aspnetboilerplate,virtualcca/aspnetboilerplate,aspnetboilerplate/aspnetboilerplate,carldai0106/aspnetboilerplate,fengyeju/aspnetboilerplate