Windows 电话 7，IsolatedStorageSettings “Remove()”不工作，一个错误？

Question

I'm using IsolatedStorageSettings class in my Windows Phone 7 project as a key-value store to remember user preferences and login credentials in my app.

The problem is, when I invoke Remove(string) method with the key and then I use Save() method to persist changes. Remove() method returns true , that means value is deleted. But when I try to get the value next time, I see that it is still there and not deleted.

Here's the code I use for deletion:

if (isolatedStore.Contains(key))
{
    isolatedStore[key] = null;
}

bool del = isolatedStore.Remove(key);
isolatedStore.Save();

Here's how I get isolatedStorage instance:

private IsolatedStorageSettings isolatedStore =
     IsolatedStorageSettings.ApplicationSettings;

Where do you think the problem is?

Answer 1

I found this block in the following link. I haven't tried to remove a key the way you're doing, though. http://social.msdn.microsoft.com/Forums/en/windowsphone7series/thread/17514c94-1f59-47b4-bb78-99694bfbb6b2

public static void DeleteObject(string key)
{
  IsolatedStorageSettings.ApplicationSettings.Remove(key);
}