Small snippet for finding the path to the user's local Dropbox folder.

Dropbox

private static string GetDropboxPath() {
    string appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
    string dbPath = Path.Combine(appDataPath, "Dropbox\\host.db");
    if (!File.Exists(dbPath)) return null;
    string[] lines = File.ReadAllLines(dbPath);
    return Encoding.UTF8.GetString(Convert.FromBase64String(lines[1]));
}