public static IManagedTransporterToken AsManaged(this IDownloader @this, string managerName = FileTransferService.DefaultManagerName)
{
Guards.ThrowIfNull(@this);
Guards.ThrowIfNullOrEmpty(managerName);
if (@this.Context == null)
{
throw new InvalidOperationException();
}
var id = @this.Id;
if (!ManagedDownloaderTokens.ContainsKey(id))
{
ManagedDownloaderTokens[id] = new ManagedDownloaderTokenImpl(FileTransferService.GetDownloaderManager(managerName), @this);
}
return(ManagedDownloaderTokens[id]);
}