I wanna set the permissions on a file to "can not be deleted" in C#, only readable. But I don't know how to do this. Can you help me ?
Take a look at File.SetAttributes(). There are lots of examples online about how to use it.
Taken from that MSDN page:
FileAttributes attributes = File.GetAttributes(path);
if ((attributes & FileAttributes.Hidden) == FileAttributes.Hidden)
{
// Show the file.
attributes = RemoveAttribute(attributes, FileAttributes.Hidden);
File.SetAttributes(path, attributes);
Console.WriteLine("The {0} file is no longer hidden.", path);
}
else
{
// Hide the file.
File.SetAttributes(path, File.GetAttributes(path) | FileAttributes.Hidden);
Console.WriteLine("The {0} file is now hidden.", path);
}