C# how-to guides

Function patterns Choose the lifecycle that fits the computation.

Run a worker Stdio, pooled Unix sockets, publishing, and process rules.

Expose a catalog Schemas, tables, views, and macros.

Optimizer integration Filters, projections, statistics, ordering, partitions, and splits.

Persist state Move buffering and aggregate state safely across processes.

Settings and secrets Declare configuration and receive resolved credentials.

Custom COPY formats Implement Arrow-backed readers and writers.

Result caching Advertise safe reuse and revalidation metadata.

Test a worker Unit, SQLLogicTest, conformance, and cross-language checks.

Call workers from .NET Understand the generic RPC client and its VGI boundary.