AynscResult not exist in .net core ?

Question

I'm migrating MVC application into .NET Core that I had to make code change arround AsyncResult class
After some basic research I found that AyncResult is not exist in .net core.
AsyncResult asyncr=(AsyncResult)ar;
Here I'm facing issue with: the type or namespace is not present .your missing namespace.
Can anyone please help me . What I have to use insted of ayncResult

Satya Karki · Answer

Yes it is. The Asynchronous Programming Model (APM) (using IAsyncResult and BeginInvoke) is no longer the preferred method of making asynchronous calls. The Task-based Asynchronous Pattern (TAP) is the recommended async model as of .NET Framework 4.5. Because of this, and because the implementation of async delegates depends on remoting features not present in .NET Core, BeginInvoke and EndInvoke delegate calls are not supported in .NET Core. This is discussed in GitHub issue dotnet/corefx #5940.https://github.com/dotnet/corefx/issues/5940   https://devblogs.microsoft.com/dotnet/migrating-delegate-begininvoke-calls-for-net-core/