Note that prior to .Net Framework 4.5 you have had to specify “Asynchronous Processing=true” in your connection string to leverage asynchronous ADO.Net calls.

The async routines only need two bytes of overhead and — unlike proper threads — don’t need a preallocated private stack. Here’s a simple example from the project’s GitHub: ...

Promises make asynchronous processing simple, consistent and easy to use. And, with TypeScript and Promises.TypeScript providing support for generic Promises, you get both type safety and IntelliSense ...