.Net Dependency Injection Service Lifetimes:
Transient
Transient lifetime services are created each time they are requested.
Example:
services.AddTransient<IRequest, MyAppRequest>();
Scoped
For web applications, a Scoped lifetime indicates that services are created once per client connection.
Example:
services.AddScoped<ISettings, ClientSettings>();
Singleton
Singleton lifetime services are created the first time they are requested.
Accessing application configuration or loading static data are examples of when to use Singleton service.
Example:
services.AddSingleton<ISettings, MyAppSettings>();
Extension Methods:
AddBlobServiceClient
Add Azure Blob Storage
Example:
AddDbContext
A Scoped lifetime service used with Entity Framework Core to connect to a database.
Example:
services.AddDbContext<DataContext>(options => options.UseSqlServer("name=ConnectionStrings:SQLConnectionString"), ServiceLifetime.Scoped);
AddOptions
Extension method for adding configuration related options services to the DI container
Example:
AddQueueServiceClient
Azure Queue Service Client.
Example:
AddSecretClient
Azure Key Vault Secrets
Example:
AddSqlServer
Registers the given Entity Framework DbContext as a service in the IServiceCollection and configures it to connect to a SQL Server database.
Example:
services.AddSqlServer<DataContext>(hostContext.Configuration["ConnectionStrings:SQLConnectionString"]);
