OnixS
low-latency .NET Framework FIX Engine is a .NET class library that will FIX-enable applications written
in .NET supported languages (C#, Visual Basic (VB.NET), Managed C++, Delphi .NET, etc).
The .NET Framework FIX Engine provides the following services:
-
Manages a network connection.
-
Manages the FIX session layer (for the delivery of application
messages), automatically handles Sequence Reset, Resend Request,
Test Request, Logon and Logout session-level messages.
-
Manages the FIX application layer (defines business-related data content).
-
Creates (outgoing) FIX messages.
-
Parses (incoming) FIX messages.
-
Validates FIX messages.
-
Persists messages and FIX session state.
-
Recovers the FIX session state after a restart
in accordance with the FIX state model.
-
Detects the telecommunication link failures
and reconnects the FIX session automatically.
-
TLS/SSL-based encryption.
-
FAST compression and decompression.
The following image is a high-level overview of the .NET Framework FIX Engine architecture:
Programming Guide 
