Tips for Debugging Your Code in Visual Studio 2010: Listing 1.

You can use the Managed Extensibility Framework (MEF) to create a provider that returns an existing TraceSource, creates or accesses one as a MEF part, or creates one through traditional means. I don't like calling this a factory, because in most cases calls don't create a new item. You can use a similar pattern in many other scenarios.

   [TraceSourceProvider()]
   public class TraceSourceProvider : ITraceSourceProvider 
   {
      [ImportMany()]
      private IEnumerable<ITraceSource> sources = null;
      private IEnumerable<TraceSource> traceSources = null;

      public System.Diagnostics.TraceSource 
        GetTraceSource(string traceSourceName)
      {
         if (traceSources  == null)
         {
            traceSources = from x in sources 
                           select x as TraceSource;
         }
         var matches = from x in traceSources 
                       where x.Name == traceSourceName 
                       select x;
         if (matches.Count() > 0)
         {
            var ret = matches.FirstOrDefault() as TraceSource;
            return ret;
         }
         var traceSource = new TraceSource(traceSourceName);
         traceSources = 
           traceSources.Union (new TraceSource[] {traceSource});
         return traceSource;
      }
comments powered by Disqus

Featured

  • AI for GitHub Collaboration? Maybe Not So Much

    No doubt GitHub Copilot has been a boon for developers, but AI might not be the best tool for collaboration, according to developers weighing in on a recent social media post from the GitHub team.

  • Visual Studio 2022 Getting VS Code 'Command Palette' Equivalent

    As any Visual Studio Code user knows, the editor's command palette is a powerful tool for getting things done quickly, without having to navigate through menus and dialogs. Now, we learn how an equivalent is coming for Microsoft's flagship Visual Studio IDE, invoked by the same familiar Ctrl+Shift+P keyboard shortcut.

  • .NET 9 Preview 3: 'I've Been Waiting 9 Years for This API!'

    Microsoft's third preview of .NET 9 sees a lot of minor tweaks and fixes with no earth-shaking new functionality, but little things can be important to individual developers.

  • Data Anomaly Detection Using a Neural Autoencoder with C#

    Dr. James McCaffrey of Microsoft Research tackles the process of examining a set of source data to find data items that are different in some way from the majority of the source items.

  • What's New for Python, Java in Visual Studio Code

    Microsoft announced March 2024 updates to its Python and Java extensions for Visual Studio Code, the open source-based, cross-platform code editor that has repeatedly been named the No. 1 tool in major development surveys.

Subscribe on YouTube