C# Excel Interop - Using Sensitivity Labels

Question

I've created an application that automates the editing of .XLSX files using the Excel Interop and then saves the files.

However, my organization's policies require applying a sensitivity label to these files, which triggers a popup (see image below).

The issue is:

• If I set EnableEvents to true in the Excel COM object, the popup blocks the process.
• If I set EnableEvents to false, the popup is bypassed, but the files are not saved successfully.

I'm looking for a way to handle or bypass this popup so the process runs smoothly without manual intervention.

Has anyone encountered this issue before, or does anyone have suggestions on how to resolve it? Thanks in advance for your help!

Excel Sensitivity Label Popup

Already tried:

• Saving in other formats, like .XLS, .XLSM
• Using LabelInfo, SensitivityLabel

More information:

• Visual Studio 2022

• .NET Framework 4.7.2

• Already tried this, but it does not work on .NET Framework.