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// For complete examples and data files, please go to https://github.com/groupdocsassembly/GroupDocs_Assembly_NET
//setting up source 
const String strDocumentTemplate = "Presentation Templates/In-Table Master-Detail.pptx";
//Setting up destination 
const String strDocumentReport = "Presentation Reports/In-Table Master-Detail_Json Report.pptx";
try
{
    //Instantiate DocumentAssembler class
    DocumentAssembler assembler = new DocumentAssembler();//initialize object of DocumentAssembler class 
    //Call AssembleDocument to generate In-Table Master-Detail report in presentation format
    assembler.AssembleDocument(CommonUtilities.GetSourceDocument(strDocumentTemplate), CommonUtilities.SetDestinationDocument(strDocumentReport), DataLayer.GetCustomerDataFromJson(), "customers");
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
}