Four code examples are available:

1. [helloworld](https://github.com/grpc/grpc-dart/tree/master/example/helloworld):
   A demonstration of using the Dart gRPC library to perform unary RPCs.

1. [googleapis](https://github.com/grpc/grpc-dart/tree/master/example/googleapis):
   A demonstration of using the Dart gRPC library to communicate with Google APIs.

1. [metadata](https://github.com/grpc/grpc-dart/tree/master/example/metadata):
   A demonstration of how to handle custom metadata, cancellation, and timeouts in Dart gRPC.

1. [route_guide](https://github.com/grpc/grpc-dart/tree/master/example/route_guide):
   A demonstration of how to perform unary, client streaming, server streaming and full duplex RPCs.

For a complete, step-wise working example, see the [Dart gRPC Quick Start](https://grpc.io/docs/quickstart/dart).