C# on Design Principia

Analyzing .NET managed code profile along with external code

Thu, 02 Sep 2021 05:18:44 +0000

How to analyze external code high CPU usage in .NET applications

.NET IDisposable implementation

Mon, 26 Feb 2018 04:02:58 +0000

The other day I got a code review comment saying that I should implement the full blown disposable pattern for IDisposable including the protected virtual void Dispose(bool disposing) method. For a long time I had implemented the IDisposable without caring about the additional overload - and I started worrying how many bugs I’ve introduced by not doing so.

The pattern

The most recent official documentation I could find describes the pattern in details, which I’ll summarize below.

The interface not supported fallacy

Sat, 20 Jan 2018 09:37:19 +0000

Today I was reviewing a colleague’s code and I saw a pattern similar to the one below:

Default property value when serializing with Newtonsoft JSON

Fri, 09 Jun 2017 12:13:07 +0000

The other day I wanted to use Newtonsoft JSON serializer to convert objects to JSON strings, with the twist that if some property of the object was null it should be defaulted to a specific value in the JSON string.

There is the DefaultValueAttribute but that seems to work only for deserialization (or so it seemed when I gave up searching for an out of the box behavior).

It turns out you can implement a ContractResolver. Inheriting from the base DefaultContractResolver seems to be the easiest way to go. Then you can override just the CreateProperty method and provide an instance of IValueProvider to the property contract generated by that method. Check out the example below.