Is it possible to perform synchronous processing of a method declared with the async keyword?

A method declared with the async keyword in C# is intended for asynchronous execution and typically returns a Task or Task<T>. However, it can also be called synchronously, for example, by calling the .Wait() or .Result method on the returned Task object.

But this is not recommended, as it can lead to thread blocking and deadlocks, especially in UI applications.

An example of a synchronous call to an async method (not recommended):

async Task<int> GetDataAsync() {
    await Task.Delay(1000);
    return 42;
}

// Synchronous call
int result = GetDataAsync().Result; // blocks the current thread

It is better to use await for asynchronous calls or to fully adopt an asynchronous programming style.