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this week's favorite

Debugging System.NullReferenceException

Time for another post in the series Debugging common .NET exceptions. Today's exception is, without a doubt, the error most people have experienced: System.NullReferenceException. The exception happens when you try to invoke a reference that you were expecting to point to an object but in fact, points to null. Let's get started!

Mediator Pattern C#

The Mediator pattern in C# enables objects to communicate, without knowing each other’s identities. It also encapsulates a protocol that objects can follow. You can think of a Mediator object as a kind of a coordinator; that handles traffic between appropriate parties based on its own logic.

C# Code Quality

Improving a codebase can be a difficult task. The larger the codebase, the more difficult it becomes to find and fix poor code manually. When confronted with a new codebase, metrics are needed to determine what needs to be improved. This article discusses some tools to get the metrics, and the series discusses how to use the information to make targeted refactors. 

Bypassing Low Type Filter in .NET Remoting

I recently added a new feature my .NET remoting exploitation tool which is many cases allow you to exploit an arbitrary service through serialization. This feature has always existed in the tool, if you passed the useser option, however it only worked if the service had enabled Full Type Filter mode, the default for remoting services is Low Type Filter which my tool couldn't easily exploit. I'm going to explain how I bypassed it Low Type Filter mode in the latest tool.

ASP.NET Core Web API Versioning

An iteration and evolutionary changes of an ASP.NET Core Web API is handled by Versioning. Versioning of an API gives confidence to the clients which consumes API for a long time. Any changes or development of an API will be accessible using the new version and it won't cause issues to the clients consuming the old version of API.


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