syntax="proto3"; option csharp_namespace="VizhTalk.Grpc.Learning.Course"; package greet; import "Proto/Shared.proto"; message CreateCourseCommand{ string title = 1; string description = 2; UploadFile image = 3; Id languageid = 4; } message UpdateCourseCommand{ Id Id = 1; string title = 2; string description = 3; int32 order = 4; optional UploadFile image = 5; Id languageid = 6; }