ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Core Namespace / Project Class / ReadOnly Property
Version

ReadOnly Property (Project)
Gets if the project is opened in a read-only state
Syntax
public bool ReadOnly {get;}
Remarks

When you open a project, if it is already in use, it will open in read-only mode even if the project is otherwise writable. Only one writable instance of a project can be opened at a time.

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also