I don't want to type directly the key of application insight to register log

Question

I don't want to type the key of application insight in the Program.cs, Can I type it in some file of configurations or in another place? It's a ASP .Net Core

I want to include a register in application insights of my logs but with modifications. Now I have a register, but I am typing the key in the Program.cs and I have "a problem" when I change of environment. Do you know any way to type this key dynamicly on the Program.cs or can I do this declaration in another place of the program.

This is the Program.cs. It started with the Main and after it starts the BuildWebHost where I load the key of applications insights and it's what I want to change:

    public static IWebHost BuildWebHost(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
        .UseStartup<Startup>()
        .ConfigureLogging(logging =>
        {
                logging.AddApplicationInsights("db0fe38d-c208-8ed7-23e4ef4479bb");

                // Optional: Apply filters to configure LogLevel Trace or above is sent to
                // ApplicationInsights for all categories.
                logging.AddFilter<ApplicationInsightsLoggerProvider>("", LogLevel.Trace);

                // Additional filtering For category starting in "Microsoft",
                // only Warning or above will be sent to Application Insights.
                logging.AddFilter<ApplicationInsightsLoggerProvider>("Microsoft", LogLevel.Warning);
        }).Build();

How I said, I would avoid to type key on the Program and I would like take this param from a config file or type this declaration in another place

Answer 1

Just add UseApplicationInsights(), then remove the instrumentation key(assume the instrumentation key set in the appsettings.json).

Sample code as below, and works well at my side:

        public static IWebHost BuildWebHost(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
        .UseApplicationInsights()  // add this line of code, and it will auto-read ikey from appsettings.json.
        .UseStartup<Startup>()
        .ConfigureLogging(logging =>
        {
            //then you can remove instrumentation key from here.
            logging.AddApplicationInsights();
            logging.AddFilter<ApplicationInsightsLoggerProvider>("", LogLevel.Trace);


            logging.AddFilter<ApplicationInsightsLoggerProvider>("Microsoft", LogLevel.Warning);
        }).Build();