Creating an X.509 Certificate Chain in C#

 .net, Azure, C#, Certificates, Device Provisioning Service, IoT Hub, Programming  4 Responses »
Apr 172018
 

I had some problems with the various PowerShell and bash samples in the Microsoft documentation on how to create a certificate chain for use with the Azure IoT Hub Device Provisioning Service. Why did it have to be so complicated to get started with X.509 based authentication towards DPS?

What if I wrote my own program to create the root certificate, some intermediaries, and could also create device certificates? I set out to do that.

In the end, it turned out to be not that hard. .NET Core 2.0 has some new classes to help with certificate requests, so it isn’t necessary to call into native Windows libraries or use an extra library like BouncyCastle etc. Continue reading »

Using Azure Application Insights to monitor a self-hosted WCF service – Part 3

 .net, Application Insights, Programming, WCF  3 Responses »
Dec 172015
 

In this part of the series I will look at using a WCF IParameterInspector implementation to time the actual WCF service operation and send the tracking metrics to Azure Application Insights.

The previous parts of this blog series have discussed adding the necessary NuGet packages to the Visual Studio project, so the Application Insights parts work, how to create a Telemetry Initializer to add information to each Application Insights tracking event, and how to use a WCF IDispatchMessageInspector to get information about each request to the WCF service.

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Using Azure Application Insights to monitor a self-hosted WCF service – Part 1

 .net, Application Insights, Programming, WCF  No Responses »
Dec 032015
 

Application Insights is a service in Microsoft Azure for Application Performance Monitoring. See more here: https://azure.microsoft.com/en-us/services/application-insights/ .

I’ve previously (1, 2, 3) posted about Application Insights when it was part of Visual Studio Online. It has been moved to the Azure portal, and now has a slightly different API.

It can be used to detect crashes, tracks performance issues and usage of mobile apps, web apps and more.
I’ve used it on a few web sites hosted in IIS or on Azure, and it works great.
For ASP.net web sites, it’s really easy to set up and get going. There the VS2015 integration to it makes it really seamless, and if you can follow a few wizard steps, there is no additional setup needed.

However, if you don’t have a mobile app, an ASP.net site on Azure or local IIS or a J2EE application, then there are no wizards, and no easy setup.

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Visual Studio Application Insights – part 3

 .net, Application Insights, Programming  No Responses »
May 272014
 

In my last two posts, I described installing the Microsoft Monitoring Agent and how to enable Visual Studio Application Insights for a web application.

It seems like a lot of work, and as yet you haven’t seen what you gain by installing the agent on your web server and adding a strange configuration file to your web application. You might wonder why you should do all of that.

This is why:

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