Analyzing your prompt, please hold on...
An error occurred while retrieving the results. Please refresh the page and try again.
The following sample code creates a workbook and adds some text in cell B4 of the first worksheet and sets its font to some unknown/non-existing font. Then it saves the workbook in HTML by setting different default font names like Courier New, Arial, Times New Roman, etc.
The screenshot shows the effect of setting different default font names via HtmlSaveOptions.DefaultFontName property.

The code generates the output HTML file with Courier New, the output HTML with Arial and the output HTML file with Times New Roman.
Analyzing your prompt, please hold on...
An error occurred while retrieving the results. Please refresh the page and try again.