040000 tree ed30099c1eb47eea04f7ea48001cf1db2a7dd347	csharp
100644 blob dc16292c8511053a7c22838b6b12ce52678ab404	field_presence.md
100644 blob 73f21a382984678f59256f347e193af5ebca0b17	implementing_proto3_presence.md
100644 blob fd1e8137972336ca41f443f2b07729f6a629a67f	options.md
100644 blob 8734c700c129e98f15e92c5a306fbee57ae94cb2	performance.md
100644 blob b9c66c02f17398ece9da61efcc240fba9a99d9b3	third_party.md