App settings are a vital part of every app you'll build as a developer. But how can we use them when deploying to Azure App Service? One option we have for storing configuration values is Azure Key Vault. This provides advanced encryption and storage of sensitive values, as well as storage of encryption keys and certificates.

Key Vault references are a great way to secure your configuration values when using Azure app service. Unfortunately, it doesn't always work perfectly first time round. To try and help with the troubleshooting process, here are some common errors to check for, broken down into different sections.

Application settings are a vital part of any app as they provide the ability to alter how your app operates without needing to update and redeploy the code. This means you can use the same version (and in particular, build) of the code across your different environments, e.g. development, staging, and production.