/// <summary>
/// Asynchronously writes a null value.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is System.Threading.CancellationToken.None.</param>
/// <returns>A System.Threading.Tasks.Task that represents the asynchronous operation.</returns>
/// <remarks>Derived classes must override this method to get asynchronous behaviour. Otherwise it will execute synchronously, returning an already-completed task.</remarks>
public override async Task WriteNullAsync(CancellationToken cancellationToken = default)
{
await base.WriteNullAsync(cancellationToken);
WroteEvent?.Invoke(this, new EventArgs());
}
/// <summary>
/// Asynchronously writes a System.String value.
/// </summary>
/// <param name="value">The System.String value to write.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is System.Threading.CancellationToken.None.</param>
/// <returns>A System.Threading.Tasks.Task that represents the asynchronous operation.</returns>
/// <remarks>Derived classes must override this method to get asynchronous behaviour. Otherwise it will execute synchronously, returning an already-completed task.</remarks>
public override async Task WriteValueAsync(string value, CancellationToken cancellationToken = default)
{
await base.WriteValueAsync(value, cancellationToken);
WroteEvent?.Invoke(this, new EventArgs());
}