rfc1459 rfc1459.AssociationManager by: rfc1459 .NET Framework 4.0 This package targets .NET Framework 4.0. The package is compatible with this framework or higher. 4,621 total downloads last updated 4/8/2017 Latest version: 1.1.1 Windows file association Association Manager is a library which makes it a lot easier for .NET developers to associate file extensions with their application.