Thanks for your inquiry. Please use the following code:
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
var table = builder.StartTable();
builder.InsertCell();
builder.Writeln("test");
builder.EndRow();
builder.EndTable();
// Call this method after when Table creation is done
table.ClearBorders();
doc.Save(MyDir + @"16.1.0.docx");