Duct-typed extension methods Example 3

Example3.cs

using System.Runtime.CompilerServices;
using System.Threading.Tasks;

// Example 3: await Lazy<Task<T>>

// Just a dummy async function
public static Task<string> GetSomethingAsync(int number) => Task.FromResult($"Something {number}");

// We need a lazy variable to work with
var lazySomething = new Lazy<Task<string>>(() => GetSomethingAsync(10));

// This extension method lets us await a Lazy<Task<T>> directly
public static TaskAwaiter<T> GetAwaiter<T>(this Lazy<Task<T>> lazyTask)
=> lazyTask.Value.GetAwaiter();

// This line will compile now
Console.WriteLine(await lazySomething);