mcs/class/System.ComponentModel.Composition/Tests/UnitTestFramework/System/ComponentModel/Composition/Diagnostics/TraceContext.cs

   1 // -----------------------------------------------------------------------\r
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.\r
   3 // -----------------------------------------------------------------------\r
   4 #if !SILVERLIGHT\r
   5 \r
   6 using System;\r
   7 using System.Linq;\r
   8 using System.Diagnostics;\r
   9 using System.Collections.Generic;\r
  10 \r
  11 namespace System.ComponentModel.Composition.Diagnostics\r
  12 {\r
  13     public partial class TraceContext : IDisposable\r
  14     {\r
  15         private readonly SourceLevels _previousLevel = TraceSourceTraceWriter.Source.Switch.Level;\r
  16         private readonly TraceContextTraceListener _listener = new TraceContextTraceListener();\r
  17 \r
  18         public TraceContext(SourceLevels level)\r
  19         {\r
  20             TraceSourceTraceWriter.Source.Switch.Level = level;\r
  21             TraceSourceTraceWriter.Source.Listeners.Add(_listener);\r
  22         }\r
  23 \r
  24         [CLSCompliant(false)]\r
  25         public TraceEventDetails LastTraceEvent\r
  26         {\r
  27             get { return _listener.TraceEvents.LastOrDefault(); }\r
  28         }\r
  29 \r
  30         [CLSCompliant(false)]\r
  31         public IList<TraceEventDetails> TraceEvents\r
  32         {\r
  33             get { return _listener.TraceEvents; }\r
  34         }\r
  35 \r
  36         public void Dispose()\r
  37         {\r
  38             TraceSourceTraceWriter.Source.Listeners.Remove(_listener);\r
  39             TraceSourceTraceWriter.Source.Switch.Level = _previousLevel;            \r
  40         }\r
  41     }\r
  42 }\r
  43 \r
  44 #endif