Updated Request Matching ProtoBuf (markdown)

Request-Matching-ProtoBuf.md

@@ -6,7 +6,6 @@ See also [mstack.nl blog: gRPC / ProtoBuf Support](https://mstack.nl/blogs/wirem
 ### Proto Definition
 Define a Proto Definition file (greet.proto)
 
-syntax = "proto3";
 ``` proto
 syntax = "proto3";
  
@@ -79,5 +78,51 @@ server
   );
 ```
 
+### Multiple Proto Definition files
+If you have multiple proto files, you have to follow these 2 rules:
+1. The first file provided in the array should be the main proto file.
+2. A comment is needed for each referenced (imported) proto file, so that WireMock.Net knows how to resolve.
+
+#### Main proto
+``` proto
+syntax = "proto3";
+
+import "request.proto";
+
+package greet;
+
+service Greeter {
+  rpc SayHello (HelloRequest) returns (HelloReply);
+}
+
+message HelloReply {
+  string message = 1;
+}
+```
+
+#### other proto file
+``` proto
+// request.proto
+syntax = "proto3";
+
+package greet;
+
+message HelloRequest {
+  string name = 1;
+}
+```
+
+#### C# code
+``` c#
+var greet = File.ReadAllText(@"c:\grpc\greet.proto");
+var request = File.ReadAllText(@"c:\grpc\request.proto");
+
+. . .
+
+server
+  // Now call the new AddProtoDefinition method to register this identifier and the 2 ProtoDefinitions in WireMock.Net
+  .AddProtoDefinition(protoDefinitionId, greet, request)
+```
+
 #### JSON Mapping option
 todo