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String dInfo = "tun1";
TunTapDevice Device = new TunTapDevice(dInfo);
Device.ConfigTun(IPAddress.Parse("10.2.2.2"), IPAddress.Parse("10.2.2.1"), IPAddress.Parse("255.255.255.0"));
Device.SetConnectionState(ConnectionStatus.Connected);
Device.CreateDeviceIOStream(1500);
FileStream DeviceIOStream = Device.TunTapDeviceIOStream;
while (true)
{
var bytes = new byte[0xFFFF];
var length = DeviceIOStream.Read(bytes);
int version = bytes[0] >> 4;
int IHL = bytes[0] & 0x0F;
if (version == 4 && IHL == 5) // IPv4 Packet with no options field
{
IPv4Packet received = new IPv4Packet(bytes);
Console.WriteLine($"{received.Protocol} {received.SourceIP}-{received.DestIP}");
}
}
DeviceIOStream.Close();
Console.WriteLine();

Unhandled exception. System.IO.IOException: The process cannot access the file because it is being used by another process.
at System.IO.Strategies.FileStreamHelpers.CheckFileCall(Int64 , String , Boolean )
at System.IO.RandomAccess.ReadAtOffset(SafeFileHandle , Span1 , Int64 ) at System.IO.Strategies.OSFileStreamStrategy.Read(Span1 )
at System.IO.Strategies.BufferedFileStreamStrategy.ReadSpan(Span1 , ArraySegment1 )
at System.IO.Strategies.BufferedFileStreamStrategy.Read(Span1 ) at System.IO.FileStream.Read(Span1 )
at ConsoleApp28.Program.Main(String[] args)
at ConsoleApp28.Program.

(String[] args)
Aborted (core dumped)