path
var a1 = Path.DirectorySeparatorChar; // win是\ unix是/
var a2 = Path.AltDirectorySeparatorChar; // win是/ unix是\
var a3 = Path.VolumeSeparatorChar; // win是: unix是/
var a4 = Path.PathSeparator; // ;
var a1 = Path.DirectorySeparatorChar; // win是\ unix是/
var a2 = Path.AltDirectorySeparatorChar; // win是/ unix是\
var a3 = Path.VolumeSeparatorChar; // win是: unix是/
var a4 = Path.PathSeparator; // ;