• Stop running NetManagers in Unity in OnApplicationQuit (when using library source code)
• Disable MTU discovery by default because some routers can break detection and connection in result. Remove UseSafeMtu (for this just use MtuOverride). To enable MTU discovery set NetManager.MtuDiscovery to true
• Add optional argument max processed events into PollEvents and ManualReceive (fix #528)
• Add methods to serialize and deserialize array of nested INetSerializable into NetDataReader/Writer
• Add GUID serialization to NetDataWriter/Reader and NetSerializer/NetPacketProcessor
• Add SendUnconnectedMessage with ReadOnlySpan argument
• Add NetDataWriter.AsReadOnlySpan()
• Add GetRemainingBytesMemory method to NetDataReader. (fix #560)
• Make PeerTimers and ElapsedMilliseconds as float (fix #521)
• Improve NetDataWriter/Reader strings.
• Add PutLargeString (with int size) and GetLargeString into NetDataWriter/Reader
• Fix ObjectDisposedException with Native Sockets (fix #542)
• Lock unreliable channel only if there is pending packets
• Unreliable packets optimization

For installation in typical .NET project use nuget package For Unity use sources zip and copy directory LiteNetLib to your project