internal static int Main(string[] args)
        {
            try
            {
                // Hack to make sure everything's initialized
                DescriptorProtoFile.Descriptor.ToString();
                GeneratorOptions options = new GeneratorOptions {
                    Arguments = args
                };

                IList <string> validationFailures;
                if (!options.TryValidate(out validationFailures))
                {
                    // We've already got the message-building logic in the exception...
                    InvalidOptionsException exception = new InvalidOptionsException(validationFailures);
                    Console.WriteLine(exception.Message);
                    return(1);
                }

                var request = new CodeGeneratorRequest.Builder();
                foreach (string inputFile in options.InputFiles)
                {
                    ExtensionRegistry extensionRegistry = ExtensionRegistry.CreateInstance();
                    CSharpOptions.RegisterAllExtensions(extensionRegistry);
                    using (Stream inputStream = File.OpenRead(inputFile))
                    {
                        var fileSet = FileDescriptorSet.ParseFrom(inputStream, extensionRegistry);
                        foreach (var fileProto in fileSet.FileList)
                        {
                            request.AddFileToGenerate(fileProto.Name);
                            request.AddProtoFile(fileProto);
                        }
                    }
                }

                Generator generator = Generator.CreateGenerator(options);
                var       response  = new CodeGeneratorResponse.Builder();
                generator.Generate(request.Build(), response);
                if (response.HasError)
                {
                    throw new Exception(response.Error);
                }
                foreach (var file in response.FileList)
                {
                    File.WriteAllText(file.Name, file.Content);
                }
                return(0);
            }
            catch (Exception e)
            {
                Console.Error.WriteLine("Error: {0}", e.Message);
                Console.Error.WriteLine();
                Console.Error.WriteLine("Detailed exception information: {0}", e);
                return(1);
            }
        }
        internal static int Main(string[] args)
        {
            try
            {
                // Hack to make sure everything's initialized
                DescriptorProtoFile.Descriptor.ToString();
                GeneratorOptions options = new GeneratorOptions {Arguments = args};

                IList<string> validationFailures;
                if (!options.TryValidate(out validationFailures))
                {
                    // We've already got the message-building logic in the exception...
                    InvalidOptionsException exception = new InvalidOptionsException(validationFailures);
                    Console.WriteLine(exception.Message);
                    return 1;
                }

                var request = new CodeGeneratorRequest.Builder();
                foreach (string inputFile in options.InputFiles)
                {
                    ExtensionRegistry extensionRegistry = ExtensionRegistry.CreateInstance();
                    CSharpOptions.RegisterAllExtensions(extensionRegistry);
                    using (Stream inputStream = File.OpenRead(inputFile))
                    {
                        var fileSet = FileDescriptorSet.ParseFrom(inputStream, extensionRegistry);
                        foreach (var fileProto in fileSet.FileList)
                        {
                            request.AddFileToGenerate(fileProto.Name);
                            request.AddProtoFile(fileProto);
                        }
                    }
                }

                Generator generator = Generator.CreateGenerator(options);
                var response = new CodeGeneratorResponse.Builder();
                generator.Generate(request.Build(), response);
                if (response.HasError)
                {
                    throw new Exception(response.Error);
                }
                foreach (var file in response.FileList)
                {
                    File.WriteAllText(file.Name, file.Content);
                }
                return 0;
            }
            catch (Exception e)
            {
                Console.Error.WriteLine("Error: {0}", e.Message);
                Console.Error.WriteLine();
                Console.Error.WriteLine("Detailed exception information: {0}", e);
                return 1;
            }
        }