/// <summary>Snippet for ExportEntities</summary>
        public void ExportEntitiesRequestObject()
        {
            // Snippet: ExportEntities(ExportEntitiesRequest, CallSettings)
            // Create client
            DatastoreAdminClient datastoreAdminClient = DatastoreAdminClient.Create();
            // Initialize request argument(s)
            ExportEntitiesRequest request = new ExportEntitiesRequest
            {
                ProjectId       = "",
                Labels          = { { "", "" }, },
                EntityFilter    = new EntityFilter(),
                OutputUrlPrefix = "",
            };
            // Make the request
            Operation <ExportEntitiesResponse, ExportEntitiesMetadata> response = datastoreAdminClient.ExportEntities(request);

            // Poll until the returned long-running operation is complete
            Operation <ExportEntitiesResponse, ExportEntitiesMetadata> completedResponse = response.PollUntilCompleted();
            // Retrieve the operation result
            ExportEntitiesResponse result = completedResponse.Result;

            // Or get the name of the operation
            string operationName = response.Name;
            // This name can be stored, then the long-running operation retrieved later by name
            Operation <ExportEntitiesResponse, ExportEntitiesMetadata> retrievedResponse = datastoreAdminClient.PollOnceExportEntities(operationName);

            // Check if the retrieved long-running operation has completed
            if (retrievedResponse.IsCompleted)
            {
                // If it has completed, then access the result
                ExportEntitiesResponse retrievedResult = retrievedResponse.Result;
            }
            // End snippet
        }
    public string ExportEntities(
        string projectId       = "your-project-id",
        string outputUrlPrefix = "gs://your-bucket-name",
        string kind            = "Task",
        string namespaceId     = "default")
    {
        // [START datastore_admin_client_create]
        // Create client
        DatastoreAdminClient datastoreAdminClient = DatastoreAdminClient.Create();
        // [END datastore_admin_client_create]

        IDictionary <string, string> labels = new Dictionary <string, string> {
            { "cloud_datastore_samples", "true" },
        };
        EntityFilter entityFilter = new EntityFilter
        {
            Kinds        = { kind },
            NamespaceIds = { namespaceId }
        };

        var response = datastoreAdminClient.ExportEntities(projectId, labels, entityFilter, outputUrlPrefix);

        // Poll until the returned long-running operation is complete
        var completedResponse = response.PollUntilCompleted();

        if (completedResponse.IsFaulted)
        {
            Console.WriteLine($"Error while Exporting Entities: {completedResponse.Exception}");
            throw completedResponse.Exception;
        }

        Console.WriteLine($"Entities exported successfully.");

        ExportEntitiesResponse result = completedResponse.Result;

        return(result.OutputUrl);
    }