The FusionAuth templates for Microsoft .NET aim to simplify the process of creating secure web applications by reducing the overhead associated with customer authentication and authorization. The templates are available through the Visual Studio Marketplace and as a NuGet package, making it easy for developers to get started with FusionAuth. To use the templates, developers can download or install them using Visual Studio or the dotnet new command, depending on their development environment. Once installed, they can create a project by selecting the desired template and entering the necessary configuration settings. The templates provide a pre-configured instance of FusionAuth that is ready to use with the application, allowing developers to focus on building their application rather than setting up authentication and authorization from scratch.