Added a few tags the quick way.
Added key "Exif.Photo.DateTimeOriginal", value "1999:12:31 23:59:59"
Added key "Exif.Image.PrimaryChromaticities", value "1/2 1/3 2/3 3/4"
Modified key "Exif.Image.PrimaryChromaticities", new value "2000:12:31 23:59:59"
Modified key "Exif.Image.PrimaryChromaticities", new value "1/2 1/3 88/77 3/4"
Deleted key "Exif.Image.PrimaryChromaticities"
0x0110 IFD0      Ascii       7 Model                       Test 1
0x0115 IFD0      Short       1 SamplesPerPixel             162
0x011a IFD0      SLong       1 XResolution                 -2
0x011b IFD0      SRational   1 YResolution                 -2/3
0x8769 IFD0      Long        1 ExifTag                     89
0x9003 Exif      Ascii      20 DateTimeOriginal            2000:12:31 23:59:59