In this example, we present C# code demonstrating asynchronous operation execution using the async and await keywords.

namespace _001_AsyncAwait
{
    internal class MyClass
    {
        public void Operation()
        {
            Console.WriteLine("Operation ThreadId {0}", Environment.CurrentManagedThreadId);
            Console.WriteLine("Begin");
            Console.WriteLine("End");
        }

        public async void OperationAsync()
        {
            Task task = new(Task);
            task.Start();
            await task;
        }
    }
}

• Task: Task represents a unit of work that can be executed asynchronously. It is an abstraction for working with asynchronous operations.

• async/await: The async and await keywords facilitate asynchronous programming. async indicates that a method contains asynchronous code, and await suspends the method's execution until an asynchronous operation is completed.

When running this code, the OperationAsync function will be executed asynchronously, resulting in the following output:

General ThreadId <ID of the main thread>
Operation ThreadId <ID of the operation thread>
Begin
End

The OperationAsync function asynchronously invokes the Operation method, which outputs information about the execution thread of the operation, the beginning, and the end. Note that the execution occurs in a single thread (the main thread), even during asynchronous handling of the operation.