public void CheckBox()
{
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
StructuredDocumentTag sdtCheckBox = new StructuredDocumentTag(doc, SdtType.Checkbox, MarkupLevel.Inline);
sdtCheckBox.Checked = true;
//Insert content control into the document
builder.InsertNode(sdtCheckBox);
MemoryStream dstStream = new MemoryStream();
doc.Save(dstStream, SaveFormat.Docx);
NodeCollection sdts = doc.GetChildNodes(NodeType.StructuredDocumentTag, true);
StructuredDocumentTag sdt = (StructuredDocumentTag)sdts[0];
Assert.AreEqual(true, sdt.Checked);
}
}