This document discusses how to securely store configuration information for a .NET API using Azure Key Vault. It involves using Key Vault to securely store cryptographic keys, secrets, and certificates that a .NET Core API can then access. The document outlines what is involved, including Key Vault, Azure CLI, .NET Core, and VS Code. It then explains how to create a .NET API, integrate it with Key Vault, and access the vault from the application. The prerequisites for implementing this are an Azure subscription, Azure CLI, VS Code, .NET SDK, and a terminal.