ArcGIS Pro 2.9 API Reference Guide
SaveAsFile(String,Boolean) Method
Example 

ArcGIS.Desktop.Layouts Namespace > Layout Class > SaveAsFile Method : SaveAsFile(String,Boolean) Method
A string representing the full path of the output file.
Set to true to overwrite the mapx file if it already exists
Exports a layout to a new layout (.pagx) file. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public void SaveAsFile( 
   string fullPathToPagXFile,
   bool overwrite
)
Public Overloads Sub SaveAsFile( _
   ByVal fullPathToPagXFile As String, _
   ByVal overwrite As Boolean _
) 

Parameters

fullPathToPagXFile
A string representing the full path of the output file.
overwrite
Set to true to overwrite the mapx file if it already exists
Exceptions
ExceptionDescription
value fullPathToPagXFile cannot be null
This method must be called within the lambda passed to QueuedTask.Run.
Remarks
A copy of the layout's definition is saved to file. A layout file can be imported into another project using the ItemFactory Class. A suffix of .pagx is added if the filename does not have one or has a different suffix. To overwrite an existing file of the same name, set overwrite = true.
Example
//Save a layout to a pagx file.

//Perform on the worker thread
await QueuedTask.Run(() =>
{
  layout.SaveAsFile(filePath);
});
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

See Also

Reference

Layout Class
Layout Members
Overload List