Minor fixes.

Author: ajcvickers

tests/MongoDB.Driver.Tests/Core/Connections/CommandEventHelperTests.cs

@@ -126,7 +126,7 @@ public void Callbacks_turn_on_when_listener_is_added_even_if_no_events(
                 };
                 ActivitySource.AddActivityListener(listener);
 
-                // With listeners registered, these always return true when unless everything is disabled.
+                // With listeners registered, these always return true unless everything is disabled.
                 commandHelper.ShouldCallBeforeSending.Should().Be(captureCommandSucceeded || captureCommandFailed || logCommands || traceCommands);
                 commandHelper.ShouldCallAfterSending.Should().Be(captureCommandSucceeded || captureCommandFailed || logCommands || traceCommands);
                 commandHelper.ShouldCallErrorSending.Should().Be(captureCommandSucceeded || captureCommandFailed || logCommands || traceCommands);

tests/SmokeTests/MongoDB.Driver.SmokeTests.Sdk/OpenTelemetryTests.cs

@@ -13,7 +13,6 @@
 * limitations under the License.
 */
 
-using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
@@ -87,7 +86,7 @@ public void MongoClient_should_not_create_activities_when_tracing_disabled()
 
         private static ActivityListener CreateActivityListener(out IReadOnlyCollection<Activity> capturedActivities)
         {
-            var activities = new ConcurrentBag<Activity>();
+            var activities = new List<Activity>();
             var listener = new ActivityListener
             {
                 ShouldListenTo = source => source.Name == MongoTelemetry.ActivitySourceName,