[release/3.0] Fix Connection Resiliency in SqlClient

src/System.Data.SqlClient/src/System/Data/SqlClient/SqlConnection.cs

@@ -912,7 +912,7 @@ internal Task ValidateAndReconnect(Action beforeDisconnect, int timeout)
                                             {
                                             }
                                             // use Task.Factory.StartNew with state overload instead of Task.Run to avoid anonymous closure context capture in method scope and avoid the unneeded allocation
-                                            runningReconnect = Task.Factory.StartNew(state => ReconnectAsync((int)state), timeout, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
+                                            runningReconnect = Task.Factory.StartNew(state => ReconnectAsync((int)state), timeout, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default).Unwrap();
                                             // if current reconnect is not null, somebody already started reconnection task - some kind of race condition
                                             Debug.Assert(_currentReconnectionTask == null, "Duplicate reconnection tasks detected");
                                             _currentReconnectionTask = runningReconnect;