Where can I safely store data files for a ClickOnce deployment?

Question

I have been using ApplicationDeployment.CurrentDeployment.DataDirectory to store content downloaded by the client at runtime which is expected to be there every

Answer 1

Check out IsolatedStorage this should help. It even works in partial trust environments.

To keep you data you need to use the application scoped IsolatedStorage

using System.IO;
using System.IO.IsolatedStorage;
...

IsolatedStorageFile appScope = IsolatedStorageFile.GetUserStoreForApplication();    
using(IsolatedStorageFileStream fs = new IsolatedStorageFileStream("data.dat", FileMode.OpenOrCreate, appScope))
{
...

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