生成秘鑰方式之一

public static string Secretkey()
{
var Secretkey = Guid.NewGuid().ToString("N")
.Remove(25, 1)
.Remove(23, 1)
.Remove(20, 1)
.Remove(18, 1)
.Remove(15, 1)
.Remove(13, 1)
.Remove(3, 1)
.Remove(1, 1);
return Secretkey;
}