Async Main methods in C# 7.1

Async methods have the tendency to bubble up to the top of the call chain. Asynchronous repository calls in a large web application are often accompanied by asynchronous methods in the controllers as well.

However, this has until recently posed a problem in Console applications where the “top” function is Main. The Main function, as we all know, must adhere to a small number of rules, one of which being that it must either be void or return an integer in case we care about the exit code. So what could we do if we wanted to call upon an asynchronous method from Main? We couldn’t change its signature unfortunately to make it async so we turned to other ways like calling GetAwaiter().GetResult() on the awaitable method.

C# 7.1 solves this problem by enabling another type of Main method signature:

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