System.Runtime.CompilerServices.TaskAwaiter<TResult>
namespace System.Runtime.CompilerServices
{
public struct TaskAwaiter<TResult> : ICriticalNotifyCompletion, INotifyCompletion
{
public bool IsCompleted { get; }
public TResult GetResult();
public void OnCompleted(Action continuation);
public void UnsafeOnCompleted(Action continuation);
}
}