Is there an equivalent to browser cookies for Smart Client / Click Once application development on .NET 3.5? Some place I can store cookies on the user's machine rather than the server.
Or to put it another way - what file location can you write to from a sandboxed Click-Once app that won't violate good security practices. I don't want to take the app out of the sandbox and run with elevated privileges if I don't have to.
Isolated storage. It's like the file system APIs, but more secure and maybe a bit more cumbersome to work with.
Have a look at isolated storage. Here's a specific blog post for ClickOnce apps.
Better than cookies, you can use the Isolated Storage API to store files on the client machine.
I'm not sure what you are asking here. Are you trying to store data? You can do that in Isolated Storage, although I find myself saving in the System.Environment.SpecialFolder.AppData a lot.
Isolated Storage: http://msdn.microsoft.com/en-us/library/3ak841sy%28VS.80%29.aspx