lazyasync.cs

/// <summary>
/// Provides support for asynchronous lazy initialization.
/// </summary>
/// <typeparam name="T"></typeparam>
public class LazyAsync<T> : Lazy<Task<T>>
{
    /// <summary>
    ///  Initializes a new instance of the LazyAsync`1 class. When lazy initialization
    ///  occurs, the specified initialization function is used.
    /// </summary>
    /// <param name="taskFunc">The delegate that is invoked to produce the lazily initialized Task when it is needed.</param>
    public LazyAsync(Func<Task<T>> taskFunc) : 
        base(() => Task.Factory.StartNew(taskFunc).Unwrap()) { }
}