How to log data to Azure Log Analytics workspace from c# code?

Question

In Log Analytics workspace, I am accessing the union of the AppRequests table and AppExceptions tables

"AppExceptions | join(AppRequests) on OperationId ",
and printing out the "Properties" column (this is a dynamic list) when there is an exception. For example

However I also get entries such as this where the fields of the "Properties" column are different.

How do I get the App Service application code to log a custom field and value in "Properties"? The App Service app is a web service. It takes as a parameter something called
"ConversationId" . In the first screen shot I can see an entry for "prop__ConversationId" but not in the second screen shot. I want to capture this "ConversationId" in the logs.

Answer 1

Log Analytics and Application Insight are part of Azure Monitoring. Log Analytics is a feature that is part of many services. Application Insights resources provide the "Log Analytics" feature. So you can write custom properties to application insights and drill using the log analytics.

Azure Monitor Overview: https://learn.microsoft.com/en-gb/azure/azure-monitor/overview?WT.mc_id=AZ-MVP-5004665

To write data to application insight follow the two steps

1. create a C# class using the following snippets, please make sure replace the highlighted values
   
2. Configure using the ApplicationInsight.config. To config, open the file and add the type under initializers