//Must use QueuedTask.Run(...)
var def_font = SymbolFactory.Instance.DefaultFont;
System.Diagnostics.Debug.WriteLine($"{def_font.fontName}, styles: {def_font.styleName}");
//set default font - set through application options
//Must use QueuedTask
ApplicationOptions.TextAndGraphicsElementsOptions.SetDefaultFont("tahoma");
ApplicationOptions.TextAndGraphicsElementsOptions.SetDefaultFont("tahoma","bold");