AArnott

public static class AwaitExtensions
{
    /// <summary>
    /// Provides await functionality for ordinary <see cref="WaitHandle"/>s.
    /// </summary>
    /// <param name="handle">The handle to wait on.</param>
    /// <returns>The awaiter.</returns>
    public static TaskAwaiter GetAwaiter(this WaitHandle handle)
    {
        Contract.Requires<ArgumentNullException>(handle != null);