public async Task AddSpecifiedDigraphsToFontTest(string inDir, string charset, string expectedPng, string expectedPar)
{
using Font font = Font.CreateFromCharsDir(inDir);
char[] set = charset.ToCharArray();
font.AddDigraphsToFont(set, set);
font.CompressBitmap();
font.SaveBigBitmap(expectedPng);
using FileStream outStream = new FileStream(expectedPar, FileMode.Create, FileAccess.Write);
await font.WriteFontPar(outStream);
//bool eq = Compare.CompareFiles(expectedPar, "temp.par");
//eq &= Compare.CompareFiles(expectedPng, "temp.png");
//File.Delete("temp.par");
//File.Delete("temp.png");
//Assert.IsTrue(eq);
}