@@ -16,6 +16,11 @@
 
 using System.Diagnostics;
 
+// The ActivityContext class is in the System.Diagnostics namespace.
+// These extension methods on ActivityContext are intentionally not placed in the
+// same namespace as Activity to prevent name collisions in the future.
+// The OpenTelemetry namespace is used because ActivityContext applies to all types
+// of telemetry data - i.e. both traces and metrics.
 namespace OpenTelemetry
 {
     /// <summary>
// <copyright file="ActivityContextExtensions.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.Diagnostics;

namespace OpenTelemetry
{
    /// <summary>
    /// Extension methods on ActivityContext.
    /// </summary>
    public static class ActivityContextExtensions
    {
        /// <summary>
        /// Returns a bool indicating if a ActivityContext is valid or not.
        /// </summary>
        /// <param name="ctx">ActivityContext.</param>
        /// <returns>whether the context is a valid one or not.</returns>
        public static bool IsValid(this ActivityContext ctx)
        {
            return ctx != default;
        }
    }
}

traces, logs and metrics