Refactor the buffer reuse code in a way that's simpler to understand
Refactor the buffer reuse code in a way that's simpler to understand

jskeet/google-api-dotnet-client,googleapis/google-api-dotnet-client,googleapis/google-api-dotnet-client,jskeet/google-api-dotnet-client,googleapis/google-api-dotnet-client,jskeet/google-api-dotnet-client