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Gets or sets the prefix of the type CSS names, such as tr and td, that are contained in the table element with the specific TableCssId attribute.
The default value is null.
public string TableCssId { get; set; }
Public Property TableCssId As String
HtmlSaveOptions options = new HtmlSaveOptions();
options.TableCssId = "salesTable";
string tableCssId = options.TableCssId;
using MemoryStream stream = new MemoryStream();
workbook.Save(stream, options);