public Task DeleteArchiveAsync(string vaultName, string archiveId) { DeleteArchiveRequest request = new DeleteArchiveRequest() { VaultName = vaultName, ArchiveId = archiveId }; ((Amazon.Runtime.Internal.IAmazonWebServiceRequest)request).AddBeforeRequestHandler(new UserAgentPostFix("DeleteArchive").UserAgentRequestEventHandlerSync); return this.glacierClient.DeleteArchiveAsync(request); }