.XAMLX File Extension
File TypeVisual Studio Workflow Service File
What is a XAMLX file?
Developer file used by Visual Studio, a software development application; uses XML formatting and defines a workflow service, which specifies activities to be implemented by a program; used for defining how a remote service program runs.
XAMLX files define a contract specifying the type of messages a hosted Workflow Service can send and receive. When started, the service uses the contract to communicate with a connecting program.
NOTE: Workflow services use the Windows Communication Foundation (WCF) framework for enabling the sending and receiving of messages.