Pasing my code block here
MainDocumentPart mainPart = Docx.MainDocumentPart;
SdtBlock[] sdtList = mainPart.Document.Body.Descendants<SdtBlock>().ToArray();
foreach (SdtBlock sdt in sdtList)
{
SdtContentBlock sd…...(sdtBlock) from document is not getting extracted from document Aspose...SdtBlock[] sdtList = mainPart.Document.Body.Descendants<SdtBlock>()...