Question

I am experimenting with this code:

        foreach (var r in _vm.Rules.Take(20)) {
            Task.Factory.StartNew(() => {
                new SQLRuleSerializer().SaveRule(_vm.SelectedKey, r);
            });             
        }

Error:

Transaction (Process ID 600) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.

I am not sure exactly how this is deadlocking considering i do not have any explicit locks.. i guess the problems is that serializer is a proxy and cannot be called in parallel even via separate instances?

Answer 1

Transaction (Process ID 600) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.

The deadlock is coming from the SQL Server, not the C# code.