For Beginners

• Collections and Data Structures – https://docs.microsoft.com/en-us/dotnet/standard/collections/

Performance

• .NET Serialization Benchmark – https://aloiskraus.wordpress.com/2019/09/29/net-serialization-benchmark-2019-roundup/
• ZString – https://github.com/Cysharp/ZString
• Fast MessagePack Serializer – https://github.com/neuecc/MessagePack-CSharp
• Fast Binary Serializer – https://github.com/neuecc/ZeroFormatter