WPF找不到某些字体

\"Arial Rounded MT Bold\"

foreach (var f in System.Windows.Media.Fonts.SystemFontFamilies)
{
    if (f.Source == \"Arial Rounded MT Bold\")
    {
        var x = \"Not Found\";
    }
}

var fc = new System.Drawing.Text.InstalledFontCollection();
foreach (var fd in fc.Families)
{
    if (fd.Name == \"Arial Rounded MT Bold\")
    {
        var x = \"Found\";
    }
}

foreach (var f in System.Windows.Media.Fonts.SystemFontFamilies)
{
      if (f.Source == \"Arial Rounded MT\")
      {
         var x = \"Found\";
      }
}