DbConnection.OpenAsync Method ()
Assembly: System.Data (in System.Data.dll)
After calling OpenAsync, State must return Connecting until the returned Task is completed. Then, if the connection was successful, State must return Open. If the connection fails, State must return Closed.
For more information about asynchronous programming in the .NET Framework Data Provider for SQL Server, see Asynchronous Programming.
Available since 10
Available since 4.5