Windows Workflow Foundation Data Model
The Windows Workflow Foundation data model is composed of three concepts: variables, arguments, and expressions. Variables represent the storage of data and arguments represent the flow of data into and out of an activity. Arguments are bound (assigned a value) using expressions that may reference variables.
In This Section
- Variables and Arguments.
Describes the concepts of variables and arguments and how they are used.
Describes expressions and how they are used in workflow development.
- C# Expressions
Describes C# expressions in workflows, introduced with .NET Framework 4.5.
- Properties vs. Arguments
Describes how to select which type to use for activity input.
- Exposing data with CacheMetadata
Describes how to expose a custom set of metadata about an executing activity's members.