log4net/MDC.cs

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#region Copyright & License
//
// Copyright 2001-2005 The Apache Software Foundation
//
// 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.
//
#endregion

using System;
using System.Collections;

namespace log4net
{
	/// <summary>
	/// Implementation of Mapped Diagnostic Contexts.
	/// </summary>
	/// <remarks>
	/// <note>
	/// <para>
	/// The MDC is deprecated and has been replaced by the <see cref="ThreadContext.Properties"/>.
	/// The current MDC implementation forwards to the <c>ThreadContext.Properties</c>.
	/// </para>
	/// </note>
	/// <para>
	/// The MDC class is similar to the <see cref="NDC"/> class except that it is
	/// based on a map instead of a stack. It provides <i>mapped
	/// diagnostic contexts</i>. A <i>Mapped Diagnostic Context</i>, or
	/// MDC in short, is an instrument for distinguishing interleaved log
	/// output from different sources. Log output is typically interleaved
	/// when a server handles multiple clients near-simultaneously.
	/// </para>
	/// <para>
	/// The MDC is managed on a per thread basis.
	/// </para>
	/// </remarks>
	/// <threadsafety static="true" instance="true" />
	/// <author>Nicko Cadell</author>
	/// <author>Gert Driesen</author>
	/*[Obsolete("MDC has been replaced by ThreadContext.Properties")]*/
	public sealed class MDC
	{
		#region Private Instance Constructors

		/// <summary>
		/// Initializes a new instance of the <see cref="MDC" /> class. 
		/// </summary>
		/// <remarks>
		/// Uses a private access modifier to prevent instantiation of this class.
		/// </remarks>
		private MDC()