Program.cs

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using Grpc.Core;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Routeguide
{
    class Program
    {
        /// <summary>
        /// Sample client code that makes gRPC calls to the server.
        /// </summary>
        public class RouteGuideClient
        {
            readonly RouteGuide.IRouteGuideClient client;

            public RouteGuideClient(RouteGuide.IRouteGuideClient client)
            {
                this.client = client;
            }

            /// <summary>
            /// Blocking unary call example.  Calls GetFeature and prints the response.
            /// </summary>
            public void GetFeature(int lat, int lon)
            {
                try
                {
                    Log("*** GetFeature: lat={0} lon={1}", lat, lon);

                    Point request = new Point { Latitude = lat, Longitude = lon };
                    
                    Feature feature = client.GetFeature(request);
                    if (feature.Exists())
                    {
                        Log("Found feature called \"{0}\" at {1}, {2}",
                            feature.Name, feature.Location.GetLatitude(), feature.Location.GetLongitude());
                    }
                    else