C# - Tag - Sean Feldman's Blog

DateTime to String with Custom Formatting

Sun, 03 Nov 2024 20:49:36 +0000

When formatting DateTime to a string, the format specifier provides access to the parts of the date and time we want to express as a string. E.g.

Fixing NServiceBus default databus serializer in .NET 6

Fri, 06 May 2022 17:31:00 +0000

Upgrading to .NET 6, updating all the packages, boosters turned on, launching testing.

Houston, we’ve got a problem.

System.NotSupportedException: BinaryFormatter serialization and deserialization are disabled within this application. See https://aka.ms/binaryformatter for more information.

Ouch! What just happened? There were no warnings, no obsolete messages, nothing on to the autopsy.

NServiceBus has a data bus (or a ‘databus’) feature. The feature implements the Claim Check pattern to allow messages to surpass the imposed maximum message size by the underlying messaging technology. The feature serializes the data internally, and the default DefaultDataBusSerializer uses BinaryFormatter. Nothing new; it has been used for years. Unfortunately, with .NET 5, BinaryFormatter was deprecated due to a security risk it poses. And while you could skip .NET 5 and live with .NET Core 3.1, .NET 6 is breathing down the neck, and an upgrade is imminent.

Content Disposition Bug in HttpResponseMessage.Conent.Headers

Wed, 16 Apr 2014 21:24:00 +0000

If you’re running into a bug like I did, there are good and bad news. Good – Microsoft acknowledged this bug and will fix it, bad – it will happen in the next release (not sure then). In MS favour I have to admit that they turn things really quick, so who knows, it might be already in the release notes of the next release :)

Moq with NameValueCollection

Wed, 11 Jan 2012 21:49:00 +0000

Mocking HttpRequest and HttpResponse is not complicated with HttpRequestBase and HttpResponseBase introduced in ASP.NET. I had to mock ServerVariables property of HttpRequest and run into an issue – I was accessing an indexer property and didn’t know how to do this. Gladly, ran into a post that mentioned that indexer is actually utilizing a virtual Get() method. Reflector has confirmed that.

image

Great! Now indexer can be mocked.

Writing a Custom ConfigurationSection

Mon, 09 Jan 2012 05:13:00 +0000

Writing a Custom ConfigurationSection is not a big task, but can be very challenging if you forget some details. I loved this post as it reminded me that you have to have both the Section tag and the collection within it tag… dah!

Stop Asserting Arguments by Name

Fri, 28 Oct 2011 02:53:00 +0000

Asserting arguments is essentially a healthy practice. What I don’t like, is the fact that since day one ArgumentNullException used a string for argument name, and now with .NET 4.5 almost knocking on the door, there’s still only string option.

Curing Singletonitis

Fri, 16 Sep 2011 03:56:00 +0000

A few years ago I have blogged about Singletonitis. Another place, different people, yet the same problem appears again – singletonitis. The issues I have outlined back then where

Testing
Difficulty to replace implementation
Requirement to track all the location where Singleton is utilized once we need to replace it.

I’d like to look into these again and re-address this ‘disease’ so to speak.

Testing (for Design Verification)

Testing is important. Maybe back then (2008) some would argue, but not today. But what this testing is for? To confirm that implementation adheres to the desired design. And, as a side effect, to have a safety net. The why not to test singleton implementation and be done? The headache with singleton is not about singleton itself, but other code/components that rely on it. Yes, these days you could use tools like Moles and Typemock, but why would you if you could DESIGN your code properly to begin with?

Creating collection with no code (almost)

Sat, 15 Jan 2011 05:56:00 +0000

When doing testing, I tend to create an object mother for the items generated multiple times for specifications. Quite often these objects need to be a part of a collection. A neat way to do so is to leverage .NET params mechanism:

MbUnit–Hidden Gem

Sat, 13 Nov 2010 05:16:00 +0000

Row tests are fun. You can simulate various inputs with expected outputs and execute them all with a single observation (test). The problem for myself was always the fact that when this was done, the only way to accomplish it was to merge the logical because which operates on system under test behaviour and the observation itself (assertion). This leads to a slightly less readable code IMO.

Creating BizTalk Message in Custom .NET Component

Thu, 30 Sep 2010 04:26:00 +0000

In my previous blog about consuming WCF service from BizTalk orchestration I wrote about how we’d invoke a service based on a document coming in and mapping it into the service request schema.

This time I had the input for the service coming from a context, and not necessarily from the document itself, and needed to be able to perform same service invocation, yet constructing request document dynamically with-in the orchestration. To simplify the process, I still pass in a document, and distinguish a field with the value I want to pass into the service. This way I don’t actually have to waste time on property promotion. The key here is to invoke a custom .NET component (GAC-ed singleton) to construct the message with the value(s) coming from the original message context.