/// <summary>
/// Raises the event that matches the specified contract name passing the <see cref="EventArgs.Empty"/> event data.
/// </summary>
/// <param name="raise">The event broker.</param>
/// <param name="contractName">The contract name of the event to raise.</param>
/// <param name="sender">The source of the event.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/> used to propagate notifications that the operation should be canceled.</param>
/// <returns>The <see cref="Task"/> that represents the asynchronous operation.</returns>
public static Task RaiseAsync(this IRaiseEvent raise, string contractName, object sender, CancellationToken cancellationToken = default)
{
Requires.NotNull(raise, nameof(raise));
return(raise.RaiseAsync(contractName, sender, EventArgs.Empty, cancellationToken));
}