Remi Hakim introduces the integration of Microsoft .NET with DogStatsD, a tool that enables the tracking of C# application performances by sending custom metrics to Datadog for real-time graphing and analysis. The new feature allows events to be sent directly from Microsoft .NET to DogStatsD, facilitating the correlation of custom events with application metrics, such as identifying if specific events coincide with metric spikes. To implement this, users need a Datadog account, the NuGet package manager, and a running Windows Datadog Agent. Installation involves using Visual Studio's Package Manager Console to execute a command to install the DogStatsD C# client, after which events can be sent from the application. Additional documentation is available on the library's GitHub repository.