@@ -27,7 +27,7 @@ namespace OpenTelemetry.Trace
         /// Adds InMemory exporter to the TracerProvider.
         /// </summary>
         /// <param name="builder"><see cref="TracerProviderBuilder"/> builder to use.</param>
-        /// <param name="exportedItems">Collection which will be populated with the exported items.</param>
+        /// <param name="exportedItems">Collection which will be populated with the exported Activity.</param>
         /// <returns>The instance of <see cref="TracerProviderBuilder"/> to chain the calls.</returns>
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Reliability", "CA2000:Dispose objects before losing scope", Justification = "The objects should not be disposed.")]
         public static TracerProviderBuilder AddInMemoryExporter(this TracerProviderBuilder builder, ICollection<Activity> exportedItems)
// <copyright file="InMemoryExporterHelperExtensions.cs" company="OpenTelemetry Authors">
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// </copyright>

using System;
using System.Collections.Generic;
using System.Diagnostics;
using OpenTelemetry.Exporter;

namespace OpenTelemetry.Trace
{
    public static class InMemoryExporterHelperExtensions
    {
        /// <summary>
        /// Adds InMemory exporter to the TracerProvider.
        /// </summary>
        /// <param name="builder"><see cref="TracerProviderBuilder"/> builder to use.</param>
        /// <param name="exportedItems">Collection which will be populated with the exported items.</param>
        /// <returns>The instance of <see cref="TracerProviderBuilder"/> to chain the calls.</returns>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Reliability", "CA2000:Dispose objects before losing scope", Justification = "The objects should not be disposed.")]
        public static TracerProviderBuilder AddInMemoryExporter(this TracerProviderBuilder builder, ICollection<Activity> exportedItems)
        {
            if (builder == null)
            {
                throw new ArgumentNullException(nameof(builder));
            }

            if (exportedItems == null)
            {
                throw new ArgumentNullException(nameof(exportedItems));
            }

            return builder.AddProcessor(new SimpleActivityExportProcessor(new InMemoryExporter<Activity>(exportedItems)));
        }
    }
}

Use `activities` instead of `Activity`?