title: How does "Connection strings" work in Azure App Service Configuration?
body: <p>I have .NET 6 app which is hosted in Azure, it is run on Linux. I just created App Service and publish there my app from Visual studio. This app is connected to MS SQL server in Azure.</p>
  <p>At first I put connection string into appsettings.json file. Then I wanted to do that in more true way. In the end I found possibility to set connection string into Configuration inside my App Service. There is even special section in Configuration, called &quot;Connection strings&quot;.</p>
  <p>So, I placed connection string there, remove it from appsettings.json, republish my app and even restart it then in Azure. It seems, app works fine.</p>
  <p>It became interesting to me how this connection string is got into my app. I noticed that into container with my app appeared environment variable SQLAZURECONNSTR_MondayDbContext with my connection string.</p>
  <p>I tried to do the same locally on my Windows 10. I set environment variable SQLAZURECONNSTR_MondayDbContext and even SQLAZURECONNSTR__MondayDbContext but app is crashed. I also tried set this through command line argument, but the same, app doesn't see connection string.</p>
  <p>How does it work in Azure?</p>