Calling async methods from non-async code

I’m in the process of updating a library that has an API surface that was built in .NET 3.5. As a result, all methods are synchronous. I can’t change the API (i.e., convert return values to Task) because that would require that all callers change. So I’m left with how to best call async methods in a synchronous way. This is in the context of ASP.NET 4, ASP.NET Core, and .NET/.NET Core console applications.

right way to create thread in ASP.NET web application

i’m creating asmx web service and have to create thread to do background IO to refresh system data. What is the right way? I’m not interested to get any results to creating thread. I just want the ASP.NET worker thread to create a thread that does it’s loading and in the end makes one assign (I think assign _alldata = newData is atomic where both instances of my own big structure class SystemData) so the worker thread that created the the new thread can propagate instantly.

Beginners threading in C#

The user does something on the ASP.Net page that causes my server-side code to need to connect to another system and carry out lengthy operations, so I want to return control to the user quickly by firing that action to another thread. The user can keep watching progress through AJAX or simply move away – the web is stateless after all 🙂