How to write logs to azure application insights from asp net core application


Writing logs is an essential part of any application process. It helps developers to and debug , monitor application performance, and gain insights into user behavior. Azure Application Insights is a powerful tool provided by that allows developers to collect and analyze telemetry data from their applications. In this article, we will explore how to logs to Azure Application Insights from an ASP.NET Core application.

Setting up Azure Application Insights

Before we dive into the code, we need to set up Azure Application Insights for our ASP.NET Core application. these steps to get started:

  1. Create an Azure account if you don't have one already.
  2. Create a new Application Insights resource in the Azure portal.
  3. Note down the Instrumentation Key provided by Azure Application Insights. We will need this key to configure our ASP.NET Core application.

Configuring ASP.NET Core Application

Once we have set up Azure Application Insights, we can proceed with configuring our ASP.NET Core application to write logs to it. Open the .cs file in your and add the following code to the ConfigureServices method:


This code configures the Application Insights telemetry service with the Instrumentation Key we obtained earlier. It enables the collection and transmission of telemetry data from our application to Azure Application Insights.

Writing Logs to Azure Application Insights

Now that we have configured our ASP.NET Core application, we can start writing logs to Azure Application Insights. The ILogger interface provided by ASP.NET Core is used for logging. We can inject this interface into our controllers, services, or any components we want to write logs.

Here's an example of how to write logs using the ILogger interface:

In this example, we inject the into our HomeController and use it to write an informational log message. The log message will be sent to Azure Application Insights and can be viewed in the Azure portal.


By following the steps outlined in this article, you can easily write logs to Azure Application Insights from your ASP.NET Core application. Logging is a crucial aspect of application development, and Azure Application Insights provides a powerful platform for collecting and analyzing telemetry data. Utilizing these capabilities can greatly enhance your application's performance, reliability, and user experience.

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