Routed by tia-openness-roadmap. C# Openness implementation of project and portal lifecycle: opening, attaching, creating, archiving, retrieving, saving, copying, closing, deleting projects, project server sessions, transactions, exclusive access, UMAC/UMC, project library entry points, project-level CAx exchange, authentication events, project history, language settings, diagnostics, and advanced multiuser/VCI workflows.

tia-project-general

Scope

Project and portal lifecycle — full C# Openness implementation.

When the roadmap routes here, the entire solution is C#. Do not mix with Python wrapper calls. Always load tia-csharp-common first (done by roadmap).

Reference files

Load ONLY the reference file(s) relevant to the task. Do not load all files at once.

Reference file	Load when the task involves
`references/project-lifecycle.md`	Open, OpenWithUpgrade, Create, Save, SaveAs, Close, Archive, Retrieve, RetrieveWithUpgrade, delete, copy
`references/project-attributes.md`	Reading project metadata (Author, Name, Version, Path, Size, dates), history entries, used products, simulation/virtual PLC properties
`references/language-settings.md`	Project languages, active/editing/reference language, multilingual text (MultilingualText, MultilingualTextItem), CommentML on devices
`references/umac-and-auth.md`	UMAC-protected project open, UmacDelegate, Authentication event, ProjectOpenMode (Primary/Secondary), UMAC user type
`references/compile.md`	Compiling any object (PlcSoftware, HmiTarget, Device, CodeBlock, PlcBlockGroup, PlcType, etc.) via ICompilable, reading CompilerResult
`references/portal-settings.md`	TiaPortalSettingsFolder (UI language, search index), ObjectIdentifierProvider, SystemDiagnostics settings export/import, read-only project access

For tasks spanning multiple areas, load all relevant reference files before generating code.

Execution pattern

Create or attach to TiaPortal instance (see tia-csharp-common)
Open, create, or retrieve Project
Use ExclusiveAccess / Transaction where needed (see tia-csharp-common)
Perform project-level Openness operations
Save / archive / close at the correct synchronisation point
Dispose the TIA Portal session