Better warning about ilogger setup in asp.net core (#4188)

docs/logs/getting-started/README.md

@@ -61,12 +61,18 @@ instance, which is then used to do the logging. The log is sent to the
 `OpenTelemetryLoggerProvider`, which is configured to export logs to
 `ConsoleExporter`. `ConsoleExporter` simply displays it on the console.
 
-Adding logging providers, obtaining `ILogger` instance, etc. could be done
-differently based on the application type. For example, [Logging in ASP.NET
-Core](https://docs.microsoft.com/aspnet/core/fundamentals/logging#logging-providers)
-shows how to do logging in ASP.NET Core, which is also demonstrated in the
-[OpenTelemetry Example ASP.NET Core
-application](../../../examples/AspNetCore/Program.cs)
+> **Note**
+> Certain types of applications (e.g. [ASP.NET
+Core](https://learn.microsoft.com/aspnet/core) and [.NET
+Worker](https://learn.microsoft.com/dotnet/core/extensions/workers)) have an
+`ILogger` based logging pipeline set up by default. In such apps, enabling
+OpenTelemetry should be done by adding OpenTelemetry as a provider to the
+*existing* logging pipeline, and users should not create a new `LoggerFactory`
+(which sets up a totally new logging pipeline). Also, obtaining `ILogger`
+instance could be done differently as well. See [Example ASP.NET Core
+application](../../../examples/AspNetCore/Program.cs) for an example which shows
+how to add OpenTelemetry to the logging pipeline already setup by the
+application.
 
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