SetFontsFolder

public void SetFontsFolder(string fontFolder, bool recursive)

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

builder.Font.Name = "Arvo";
builder.Writeln("Hello world!");
builder.Font.Name = "Amethysta";
builder.Writeln("The quick brown fox jumps over the lazy dog.");

// Our font sources do not contain the font that we have used for text in this document.
// If we use these font settings while rendering this document,
// Aspose.Words will apply a fallback font to text which has a font that Aspose.Words cannot locate.
FontSourceBase[] originalFontSources = FontSettings.DefaultInstance.GetFontsSources();

Assert.AreEqual(1, originalFontSources.Length);
Assert.True(originalFontSources[0].GetAvailableFonts().Any(f => f.FullFontName == "Arial"));

// The default font sources are missing the two fonts that we are using in this document.
Assert.False(originalFontSources[0].GetAvailableFonts().Any(f => f.FullFontName == "Arvo"));
Assert.False(originalFontSources[0].GetAvailableFonts().Any(f => f.FullFontName == "Amethysta"));

// Use the "SetFontsFolder" method to set a directory which will act as a new font source.
// Pass "false" as the "recursive" argument to include fonts from all the font files that are in the directory
// that we are passing in the first argument, but not include any fonts in any of that directory's subfolders.
// Pass "true" as the "recursive" argument to include all font files in the directory that we are passing
// in the first argument, as well as all the fonts in its subdirectories.
FontSettings.DefaultInstance.SetFontsFolder(FontsDir, recursive);

FontSourceBase[] newFontSources = FontSettings.DefaultInstance.GetFontsSources();

Assert.AreEqual(1, newFontSources.Length);
Assert.False(newFontSources[0].GetAvailableFonts().Any(f => f.FullFontName == "Arial"));
Assert.True(newFontSources[0].GetAvailableFonts().Any(f => f.FullFontName == "Arvo"));

// The "Amethysta" font is in a subfolder of the font directory.
if (recursive)
{
    Assert.AreEqual(25, newFontSources[0].GetAvailableFonts().Count);
    Assert.True(newFontSources[0].GetAvailableFonts().Any(f => f.FullFontName == "Amethysta"));
}
else
{
    Assert.AreEqual(18, newFontSources[0].GetAvailableFonts().Count);
    Assert.False(newFontSources[0].GetAvailableFonts().Any(f => f.FullFontName == "Amethysta"));
}

doc.Save(ArtifactsDir + "FontSettings.SetFontsFolder.pdf");

// Restore the original font sources.
FontSettings.DefaultInstance.SetFontsSources(originalFontSources);