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64.041S0 451.328 0 415.959s28.672-64.041 64.041-64.041s64.04 28.673 64.04 64.041m175.66 47.25c-8.354-154.6-132.185-278.587-286.95-286.95C7.656 175.765 0 183.105 0 192.253v48.069c0 8.415 6.49 15.472 14.887 16.018c111.832 7.284 201.473 96.702 208.772 208.772c.547 8.397 7.604 14.887 16.018 14.887h48.069c9.149.001 16.489-7.655 15.995-16.79m144.249.288C439.596 229.677 251.465 40.445 16.503 32.01C7.473 31.686 0 38.981 0 48.016v48.068c0 8.625 6.835 15.645 15.453 15.999c191.179 7.839 344.627 161.316 352.465 352.465c.353 8.618 7.373 15.453 15.999 15.453h48.068c9.034-.001 16.329-7.474 16.005-16.504\"\u002F>",{"id":40,"title":41,"author":42,"body":43,"comments":240,"date":246,"dateModified":247,"description":248,"extension":249,"headings":250,"heroImage":255,"meta":256,"path":61,"permalink":61,"published":257,"stem":258,"tags":259,"timeToRead":270},"posts\u002Fposts\u002F2021\u002Fopen-telemetry-for-asp-net-core\u002Findex.md","Open Telemetry for ASP.NET Core","Muhammad Rehan Saeed",{"type":44,"value":45,"toc":237},"minimark",[46,75,79,82,105,113,124,135,142,157,162,169,175,182,193,196,202,205,216,219,230,233],[47,48,49,57,63,69],"ol",{},[50,51,52],"li",{},[53,54,56],"a",{"href":55},"\u002Fdeep-dive-into-open-telemetry-for-net\u002F","Open Telemetry - Deep Dive into Open Telemetry for .NET",[50,58,59],{},[53,60,62],{"href":61},"\u002Fopen-telemetry-for-asp-net-core\u002F","Open Telemetry - Configuring Open Telemetry for ASP.NET Core",[50,64,65],{},[53,66,68],{"href":67},"\u002Fexporting-open-telemetry-data-to-jaeger\u002F","Open Telemetry - Exporting Open Telemetry Data to Jaeger",[50,70,71],{},[53,72,74],{"href":73},"\u002Foptimally-configuring-open-telemetry-tracing-for-asp-net-core\u002F","Open Telemetry - Optimally Configuring Open Telemetry Tracing for ASP.NET Core",[76,77,78],"p",{},"Configuring Open Telemetry for ASP.NET Core is a fairly simple process. In this post, I'll show you the simplest setup for tracing Open Telemetry in ASP.NET Core and then move to a more fully featured example.",[76,80,81],{},"To begin with, we'll just be exporting our Open Telemetry traces to the debug output so we can see what is being recorded but we'll soon move on to exporting to Jaeger in another post where we can see nice visualisations of our traces.",[83,84,86,104],"h1",{"id":85},"the-simplest-setup",[53,87,90],{"href":88,"aria-hidden":89},"#the-simplest-setup","true",[91,92,98],"svg",{"xmlns":93,"xmlns:xlink":94,"viewBox":95,"version":96,"width":97,"height":97,"aria-hidden":89},"http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg","http:\u002F\u002Fwww.w3.org\u002F1999\u002Fxlink","0 0 16 16","1.1",22,[99,100],"path",{"fill":101,"fill-rule":102,"d":103},"currentColor","evenodd","M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z","The Simplest Setup",[76,106,107,108,112],{},"Open Telemetry for ASP.NET Core ships as several NuGet packages. The ",[109,110,111],"code",{},"OpenTelemetry.Extensions.Hosting"," package is the required core package to add Open Telemetry to your application.",[76,114,115,116,119,120,123],{},"You can optionally add packages beginning with ",[109,117,118],{},"OpenTelemetry.Instrumentation.*"," to collect extra span attributes e.g. the ",[109,121,122],{},"OpenTelemetry.Instrumentation.AspNetCore"," package adds span attributes for the current request and response.",[76,125,126,127,130,131,134],{},"You can also optionally add packages beginning with ",[109,128,129],{},"OpenTelemetry.Exporter.*"," to export trace data e.g. the ",[109,132,133],{},"OpenTelemetry.Exporter.Console"," package exports all trace data to the console or debug output of your application.",[136,137],"pre",{"className":138,"language":139,"meta":140,"style":140,"html":141},"language-xml shiki shiki-themes light-plus monokai","xml","","\u003Cspan class=\"line\">\u003Cspan class=\"sNflI\"><\u003C\u002Fspan>\u003Cspan class=\"sjbfc\">ItemGroup\u003C\u002Fspan>\u003Cspan class=\"snDo4\"> Label\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">=\u003C\u002Fspan>\u003Cspan class=\"squEy\">\"Package References\"\u003C\u002Fspan>\u003Cspan class=\"sNflI\">>\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sNflI\">  <\u003C\u002Fspan>\u003Cspan class=\"sjbfc\">PackageReference\u003C\u002Fspan>\u003Cspan class=\"snDo4\"> Include\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">=\u003C\u002Fspan>\u003Cspan class=\"squEy\">\"OpenTelemetry.Exporter.Console\"\u003C\u002Fspan>\u003Cspan class=\"snDo4\"> Version\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">=\u003C\u002Fspan>\u003Cspan class=\"squEy\">\"1.0.1\"\u003C\u002Fspan>\u003Cspan class=\"sNflI\"> \u002F>\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sNflI\">  <\u003C\u002Fspan>\u003Cspan class=\"sjbfc\">PackageReference\u003C\u002Fspan>\u003Cspan class=\"snDo4\"> Include\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">=\u003C\u002Fspan>\u003Cspan class=\"squEy\">\"OpenTelemetry.Extensions.Hosting\"\u003C\u002Fspan>\u003Cspan class=\"snDo4\"> Version\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">=\u003C\u002Fspan>\u003Cspan class=\"squEy\">\"1.0.0-rc2\"\u003C\u002Fspan>\u003Cspan class=\"sNflI\"> \u002F>\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sNflI\">  <\u003C\u002Fspan>\u003Cspan class=\"sjbfc\">PackageReference\u003C\u002Fspan>\u003Cspan class=\"snDo4\"> Include\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">=\u003C\u002Fspan>\u003Cspan class=\"squEy\">\"OpenTelemetry.Instrumentation.AspNetCore\"\u003C\u002Fspan>\u003Cspan class=\"snDo4\"> Version\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">=\u003C\u002Fspan>\u003Cspan class=\"squEy\">\"1.0.0-rc2\"\u003C\u002Fspan>\u003Cspan class=\"sNflI\"> \u002F>\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sNflI\"><\u002F\u003C\u002Fspan>\u003Cspan class=\"sjbfc\">ItemGroup\u003C\u002Fspan>\u003Cspan class=\"sNflI\">>\n\u003C\u002Fspan>\u003C\u002Fspan>",[76,143,144,145,148,149,152,153,156],{},"In our ",[109,146,147],{},"Program.cs"," I've added a ",[109,150,151],{},"ConfigureServices"," method, where we can add Open Telemetry support with just a few lines of code using the ",[109,154,155],{},"AddOpenTelemetryTracing"," method.",[136,158],{"className":159,"language":160,"meta":140,"style":140,"html":161},"language-cs shiki shiki-themes light-plus monokai","cs","\u003Cspan class=\"line\">\u003Cspan class=\"sJvqV\">public\u003C\u002Fspan>\u003Cspan class=\"sJvqV\"> virtual\u003C\u002Fspan>\u003Cspan class=\"sJvqV\"> void\u003C\u002Fspan>\u003Cspan class=\"sWm5y\"> ConfigureServices\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">(\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sw29p\">    IServiceCollection\u003C\u002Fspan>\u003Cspan class=\"sFrd5\"> services\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">,\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sw29p\">    IWebHostEnvironment\u003C\u002Fspan>\u003Cspan class=\"sFrd5\"> webHostEnvironment\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">)\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">{\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"s1q82\">    \u002F\u002F ...omitted\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sFrd5\">    services\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">.\u003C\u002Fspan>\u003Cspan class=\"sWm5y\">AddOpenTelemetryTracing\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">(\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sFrd5\">        builder\u003C\u002Fspan>\u003Cspan class=\"snCLD\"> =>\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">        {\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sFrd5\">            builder\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">                .\u003C\u002Fspan>\u003Cspan class=\"sWm5y\">SetResourceBuilder\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">(\u003C\u002Fspan>\u003Cspan class=\"sFrd5\">ResourceBuilder\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">                    .\u003C\u002Fspan>\u003Cspan class=\"sWm5y\">CreateDefault\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">()\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">                    .\u003C\u002Fspan>\u003Cspan class=\"sWm5y\">AddService\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">(\u003C\u002Fspan>\u003Cspan class=\"sFrd5\">webHostEnvironment\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">.\u003C\u002Fspan>\u003Cspan class=\"sFrd5\">ApplicationName\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">))\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">                .\u003C\u002Fspan>\u003Cspan class=\"sWm5y\">AddAspNetCoreInstrumentation\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">();\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"smL5M\">            if\u003C\u002Fspan>\u003Cspan class=\"sjLUg\"> (\u003C\u002Fspan>\u003Cspan class=\"sFrd5\">webHostEnvironment\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">.\u003C\u002Fspan>\u003Cspan class=\"sWm5y\">IsDevelopment\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">())\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">            {\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sFrd5\">                builder\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">.\u003C\u002Fspan>\u003Cspan class=\"sWm5y\">AddConsoleExporter\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">(\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sFrd5\">                    options\u003C\u002Fspan>\u003Cspan class=\"snCLD\"> =>\u003C\u002Fspan>\u003Cspan class=\"sFrd5\"> options\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">.\u003C\u002Fspan>\u003Cspan class=\"sFrd5\">Targets\u003C\u002Fspan>\u003Cspan class=\"snCLD\"> =\u003C\u002Fspan>\u003Cspan class=\"sFrd5\"> ConsoleExporterOutputTargets\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">.\u003C\u002Fspan>\u003Cspan class=\"sFrd5\">Debug\u003C\u002Fspan>\u003Cspan class=\"sjLUg\">);\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">            }\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">        });\n\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"line\">\u003Cspan class=\"sjLUg\">}\n\u003C\u002Fspan>\u003C\u002Fspan>",[76,163,164,165,168],{},"The ",[109,166,167],{},"SetResourceBuilder"," method is your opportunity to add a set of common attributes to all spans created in the application. In the above case, we've added an application name.",[76,170,164,171,174],{},[109,172,173],{},"AddAspNetCoreInstrumentation"," method is where we enable collection of attributes relating to ASP.NET Core requests and responses.",[76,176,177,178,181],{},"Finally, we use ",[109,179,180],{},"AddConsoleExporter"," to export the trace data to the debug output. You could also output to the console but there is a lot of trace data and the console is already outputting log information which results in duplication, so I prefer not to do that. Note that we only do this if we are running in the development environment.",[83,183,185,192],{"id":184},"the-trace-output",[53,186,188],{"href":187,"aria-hidden":89},"#the-trace-output",[91,189,190],{"xmlns":93,"xmlns:xlink":94,"viewBox":95,"version":96,"width":97,"height":97,"aria-hidden":89},[99,191],{"fill":101,"fill-rule":102,"d":103},"The Trace Output",[76,194,195],{},"If we now start the application and execute a request\u002Fresponse cycle, we can see the following in our IDE's debug output window:",[136,197],{"className":198,"language":200,"html":201},[199],"language-text","text","Activity.Id:          00-dde96d459fee4144a83818e054e221b1-cac69896c1bcd14f-01\nActivity.DisplayName: \u002Ffavicon-32x32.png\nActivity.Kind:        Server\nActivity.StartTime:   2021-02-01T10:28:25.4637044Z\nActivity.Duration:    00:00:00.0086712\nActivity.TagObjects:\n    http.host: localhost:5001\n    http.method: GET\n    http.path: \u002Ffavicon-32x32.png\n    http.url: https:\u002F\u002Flocalhost:5001\u002Ffavicon-32x32.png\n    http.user_agent: Mozilla\u002F5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\u002F537.36 (KHTML, like Gecko) Chrome\u002F88.0.4324.104 Safari\u002F537.36\n    http.status_code: 200\n    otel.status_code: UNSET\n    service.name: ApiTemplate\n    service.instance.id: defe9269-04f2-4b49-a05c-ebddf2112993\n    telemetry.sdk.name: opentelemetry\n    telemetry.sdk.language: dotnet\n    telemetry.sdk.version: 1.0.0.0\n",[76,203,204],{},"The first few lines give us some basic information about the span, including the span ID, start time and duration of the span. Under TagObjects is where we can see all attributes assigned to the span.",[76,206,207,208,211,212,215],{},"All attributes starting with ",[109,209,210],{},"http"," tell us about the request and response while the attributes starting with ",[109,213,214],{},"service"," tell us about the application itself. This includes a unique identifier for the current instance of the application. This can be useful if we were running multiple instances of the application in Kubernetes or Docker Swarm for example.",[76,217,218],{},"Finally, we also get quite a lot of information about the Open Telemetry library used to collect the information. It may eventually be useful when multiple versions of the Open Telemetry protocol are released and there is some feature difference between them but as of now, it's not very useful. I haven't been able to find a way to turn it off, since it's a fair amount of information to send in absolutely every trace message.",[83,220,222,229],{"id":221},"up-next",[53,223,225],{"href":224,"aria-hidden":89},"#up-next",[91,226,227],{"xmlns":93,"xmlns:xlink":94,"viewBox":95,"version":96,"width":97,"height":97,"aria-hidden":89},[99,228],{"fill":101,"fill-rule":102,"d":103},"Up Next",[76,231,232],{},"I've shown a basic example of setting up Open Telemetry and discussed the defaults of what trace data is collected in ASP.NET Core. In my next post, I'll cover how you can fire up Jaeger and show how you can get an ASP.NET Core app to export Open Telemetry data to it.",[234,235,236],"style",{},"html pre.shiki code .sNflI, html code.shiki .sNflI{--shiki-default:#800000;--shiki-dark:#F8F8F2}html pre.shiki code .sjbfc, html code.shiki .sjbfc{--shiki-default:#800000;--shiki-dark:#F92672}html pre.shiki code .snDo4, html code.shiki .snDo4{--shiki-default:#E50000;--shiki-dark:#A6E22E}html pre.shiki code .sjLUg, html code.shiki .sjLUg{--shiki-default:#000000;--shiki-dark:#F8F8F2}html pre.shiki code .squEy, html code.shiki .squEy{--shiki-default:#0000FF;--shiki-dark:#E6DB74}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: 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Post","\u002Fjust-start-the-first-blog-post\u002F","\u002Fimages\u002Fhero\u002FJust-Start-1366x768.png",{"title":277,"permalink":278,"heroImage":279,"timeToRead":238},"ConfigureAwait in Task Parallel Library (TPL)","\u002Fconfigureawait-task-parallel-library\u002F","\u002Fimages\u002Fhero\u002FMicrosoft-.NET-1366x768.png",{"title":281,"permalink":282,"heroImage":283,"timeToRead":270},"Stop The Brace Wars, Use StyleCop","\u002Fstop-brace-wars-use-stylecop\u002F","\u002Fimages\u002Fhero\u002FStyleCop-1366x768.png",{"title":285,"permalink":286,"heroImage":287,"timeToRead":288},"Reactive Extensions (Rx) - Part 1 - Replacing C# Events","\u002Freactive-extensions-part1-replacing-events\u002F","\u002Fimages\u002Fhero\u002FReactive-Extensions-1366x768.png",4,{"title":290,"permalink":291,"heroImage":287,"timeToRead":270},"Reactive Extensions (Rx) - Part 2 - Wrapping C# 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ToObservable","\u002Freactive-extensions-part6-task-toobservable\u002F",5,{"title":330,"permalink":331,"heroImage":332,"timeToRead":252},"Portable Class Library (PCL) version of NotificationsExtensions NuGet package","\u002Fportable-class-library-version-of-notificationsextensions-nuget-package\u002F","\u002Fimages\u002Fhero\u002FNuGet-1366x768.png",{"title":334,"permalink":335,"heroImage":336,"timeToRead":328},"Model-View-ViewModel (MVVM) - Part 1 - Overview","\u002Fmodel-view-viewmodel-mvvm-part1-overview\u002F","\u002Fimages\u002Fhero\u002FMVVM-1366x768.png",{"title":338,"permalink":339,"heroImage":336,"timeToRead":288},"Model-View-ViewModel (MVVM) - Part 2 - IDisposable","\u002Fmodel-view-viewmodel-mvvm-part2-idisposable\u002F",{"title":341,"permalink":342,"heroImage":336,"timeToRead":343},"Model-View-ViewModel (MVVM) - Part 3 - INotifyPropertyChanged","\u002Fmodel-view-viewmodel-mvvm-part3-inotifypropertychanged\u002F",11,{"title":345,"permalink":346,"heroImage":347,"timeToRead":270},"Naming Conventions","\u002Fnaming-conventions\u002F","\u002Fimages\u002Fhero\u002FNaming-Conventions-1366x768.png",{"title":349,"permalink":350,"heroImage":336,"timeToRead":351},"Model-View-ViewModel (MVVM) - Part 4 - INotifyDataErrorInfo","\u002Fmodel-view-viewmodel-mvvm-part4-inotifydataerrorinfo\u002F",12,{"title":353,"permalink":354,"heroImage":317,"timeToRead":288},"Elysium Extra 1.1 Released","\u002Felysium-extra-1-1-released\u002F",{"title":356,"permalink":357,"heroImage":358,"timeToRead":359},"ASP.NET Core Boilerplate","\u002Fasp-net-mvc-boilerplate\u002F","\u002Fimages\u002Fhero\u002FASP.NET-Core-Boilerplate-1366x768.png",7,{"title":361,"permalink":362,"heroImage":363,"timeToRead":364},"Internet Favicon Madness (Updated)","\u002Finternet-favicon-madness\u002F","\u002Fimages\u002Fhero\u002FFavicons-1366x768.png",17,{"title":366,"permalink":367,"heroImage":368,"timeToRead":359},"Custom Visual Studio Project Templates","\u002Fcustom-visual-studio-project-templates\u002F","\u002Fimages\u002Fhero\u002FVisual-Studio-1366x768.png",{"title":370,"permalink":371,"heroImage":368,"timeToRead":270},"Configuration File Transforms In Visual Studio Should Be Built In","\u002Fconfiguration-file-transforms-in-visual-studio-should-be-built-in\u002F",{"title":373,"permalink":374,"heroImage":358,"timeToRead":343},"Securing the ASP.NET MVC Web.config","\u002Fsecuring-the-aspnet-mvc-web-config\u002F",{"title":376,"permalink":377,"heroImage":287,"timeToRead":238},"Reactive Extensions (Rx) - Part 7 - Sample Events","\u002Freactive-extensions-part7-sample-events\u002F",{"title":379,"permalink":380,"heroImage":381,"timeToRead":382},"NWebSec ASP.NET MVC Security Through HTTP Headers","\u002Fnwebsec-asp-net-mvc-security-through-http-headers\u002F","\u002Fimages\u002Fhero\u002FNWebSec-1366x768.png",6,{"title":384,"permalink":385,"heroImage":386,"timeToRead":97},"Content Security Policy (CSP) for ASP.NET MVC","\u002Fcontent-security-policy-for-asp-net-mvc\u002F","\u002Fimages\u002Fhero\u002FContent-Security-Policy-CSP-for-ASP.NET-MVC-1366x768.png",{"title":388,"permalink":389,"heroImage":279,"timeToRead":328},"C# 6.0 - Saving Developers From Themselves","\u002Fc-6-0-saving-developers-from-themselves\u002F",{"title":391,"permalink":392,"heroImage":393,"timeToRead":394},"Building RSS\u002FAtom Feeds for ASP.NET MVC","\u002Fbuilding-rssatom-feeds-for-asp-net-mvc\u002F","\u002Fimages\u002Fhero\u002FRSS-And-Atom-1366x768.png",19,{"title":396,"permalink":397,"heroImage":398,"timeToRead":343},"Canonical URL's for ASP.NET 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