C#修改文件或文件夹的权限,为指定用户、用户组添加完全控制权限
public void SetFileRole(string foldPath)
{
DirectorySecurity fsec = new DirectorySecurity();
fsec.AddAccessRule(new FileSystemAccessRule("Everyone", FileSystemRights.FullControl,
InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None, AccessControlType.Allow));
System.IO.Directory.SetAccessControl(foldPath, fsec);
}