Dont allow exceptions to emerge on the threadpool

src/System.Data.SqlClient/src/System/Data/ProviderBase/DbConnectionPool.cs

@@ -1376,9 +1376,19 @@ private void PoolCreateRequest(object state)
                                 {
                                     while (NeedToReplenish)
                                     {
-                                        // Don't specify any user options because there is no outer connection associated with the new connection
-                                        newObj = CreateObject(owningObject: null, userOptions: null, oldConnection: null);
-
+                                        try
+                                        {
+                                            // Don't specify any user options because there is no outer connection associated with the new connection
+                                            newObj = CreateObject(owningObject: null, userOptions: null, oldConnection: null);
+                                        }
+                                        catch
+                                        {
+                                            // Catch all the exceptions occuring during CreateObject so that they 
+                                            // don't emerge as unhandled on the thread pool and don't crash applications
+                                            // The error is handled in CreateObject and surfaced to the caller of the Connection Pool
+                                            // using the ErrorEvent. Hence it is OK to swallow all exceptions here.
+                                            break;
+                                        }
                                         // We do not need to check error flag here, since we know if
                                         // CreateObject returned null, we are in error case.
                                         if (null != newObj)

src/System.Data.SqlClient/tests/FunctionalTests/SqlConnectionBasicTests.cs

@@ -135,6 +135,21 @@ public void ConnectionTimeoutTestWithThread()
             Console.WriteLine($"ConnectionTimeoutTestWithThread: Elapsed Time {theMax} and threshold {threshold}");
         }
 
+        [OuterLoop("Can take up to 4 seconds")]
+        [Fact]
+        public void ExceptionsWithMinPoolSizeCanBeHandled()
+        {
+            string connectionString = $"Data Source={Guid.NewGuid().ToString()};uid=random;pwd=asd;Connect Timeout=2; Min Pool Size=3";
+            for (int i = 0; i < 2; i++)
+            {
+                using (SqlConnection connection = new SqlConnection(connectionString))
+                {
+                    Exception exception = Record.Exception(() => connection.Open());
+                    Assert.True(exception is InvalidOperationException || exception is SqlException, $"Unexpected exception: {exception}");
+                }
+            }
+        }
+
         public class ConnectionWorker
         {
             private static ManualResetEventSlim startEvent = new ManualResetEventSlim(false);