I decided to use a fixed list. It does not require Win2D.
If anyone is interested, here is a list of fonts that are guaranteed to be available in all editions of Windows 10 that support UWP applications:
Developed by https://msdn.microsoft.com/en-us/library/windows/apps/hh700394.aspx
public static string[] FontNames = {
"Arial", "Calibri", "Cambria", "Cambria Math", "Comic Sans MS", "Courier New",
"Ebrima", "Gadugi", "Georgia",
"Javanese Text Regular Fallback font for Javanese script", "Leelawadee UI",
"Lucida Console", "Malgun Gothic", "Microsoft Himalaya", "Microsoft JhengHei",
"Microsoft JhengHei UI", "Microsoft New Tai Lue", "Microsoft PhagsPa",
"Microsoft Tai Le", "Microsoft YaHei", "Microsoft YaHei UI",
"Microsoft Yi Baiti", "Mongolian Baiti", "MV Boli", "Myanmar Text",
"Nirmala UI", "Segoe MDL2 Assets", "Segoe Print", "Segoe UI", "Segoe UI Emoji",
"Segoe UI Historic", "Segoe UI Symbol", "SimSun", "Times New Roman",
"Trebuchet MS", "Verdana", "Webdings", "Wingdings", "Yu Gothic",
"Yu Gothic UI"
};
, , , Javanese Text Regular Fallback font for Javanese script Microsoft * Segoe MDL2 Assets plus (Web|Wing)dings, .