/// <summary>
/// Instructs the client proxy to close its connection from the server side, no additional messages will be sent to it.
/// </summary>
/// <param name="reason">The status reason why the connection is being closed. This may be
/// sent to the client depending on implementation.</param>
/// <param name="message">A human readonable description as to why the connection was closed by
/// the server.</param>
/// <param name="cancelToken">A cancellation token.</param>
/// <returns>Task.</returns>
public Task CloseConnection(
ClientConnectionCloseStatus reason,
string message = null,
CancellationToken cancelToken = default)
{
this.ProcessCloseRequest();
if (_connection.State == ClientConnectionState.Open)
{
return(_connection.CloseAsync(reason, message, cancelToken));
}
return(Task.CompletedTask);
}