SyncFusion can't open file "presentation_after.pptx" with "Presentation.Open(filename)", but I can manipulate it normally using Powerpoint.
Tech info from my side in case you can't run MS code sample:
"Object reference not set to an instance of an object".
at Syncfusion.Presentation.FileDataHolder.ParseMasterRelation(MasterSlide masterSlide, String masterPath)
at Syncfusion.Presentation.Presentation.ParseDocument(Stream fileStream)
at Syncfusion.Presentation.Presentation.Open(String fileName)
at ReplaceMasters.MasterSource.CreateNewMasterSource(String outputFilePath, String thumbsFolder) in C:\code\ReplaceMasters\MasterSource.cs:line 109
at ReplaceMasters.Form1.btnCreateNewMasterSource_Click(Object sender, EventArgs e) in C:\code\ReplaceMasters\Form1.cs:line 211
Could you please help me on this? I really need to open presentations that had masters replaced with SyncFusion.