Implementing custom telemetry capture

We will create a simple example that will allow us to not only see how the OpenTelemetry SDK works but also how Meter objects can be used to house many different counters and data points:

1. Create a new Minimal API project in Visual Studio or with the dotnet command line. Here is the screenshot for the new Minimal API project:

Figure 13.1 – New project dialog in Visual Studio

Here is the screenshot for the dotnet command-line interface:

Figure 13.2 – Creating a Minimal API project from the dotnet CLI

2. Be sure to uncheck the Use controllers checkbox to use minimal APIs if using the new project dialog from Visual Studio:

Figure 13.3 – Additional Information page in the New Project dialog

3. Add a NuGet reference to System.Diagnostics.DiagnosticSource and OpenTelemetry.Instrumentation.EventCounters:

   dotnet add package System...