silverlight独立存储示例

void CreateDir(string dirName)
        {
            IsolatedStorageFile storeFile =
                IsolatedStorageFile.GetUserStoreForApplication();
            storeFile.CreateDirectory(dirName);
        }

        void SaveFile(string savePath, string content)
        {
            IsolatedStorageFile storeFile =
                IsolatedStorageFile.GetUserStoreForApplication();
            IsolatedStorageFileStream sf = storeFile.CreateFile(savePath);
            using (StreamWriter sw = new StreamWriter(sf))
            {
                sw.WriteLine(content);
            }
            sf.Close();
        }

        void LoadFile(string readPath)
        {
            string content = string.Empty;
            using (IsolatedStorageFile storeFile =
                IsolatedStorageFile.GetUserStoreForApplication())
            {
                if (storeFile.FileExists(readPath))
                {
                    StreamReader sr =
                        new StreamReader(storeFile.OpenFile
                            (readPath, FileMode.Open, FileAccess.Read));
                    content = sr.ReadToEnd();
                }
            }
        }

        void DeleteFile(string path)
        {
            using (IsolatedStorageFile storeFile =
                IsolatedStorageFile.GetUserStoreForApplication())
            {
                storeFile.DeleteFile(path);
            }
        }

        void DeleteDir(string dirPath)
        {
            using (IsolatedStorageFile storeFile =
                IsolatedStorageFile.GetUserStoreForApplication())
            {
                storeFile.DeleteDirectory(dirPath);
            }
        }

        void LoadDirs()
        {
            using (IsolatedStorageFile storeFile =
                IsolatedStorageFile.GetUserStoreForApplication())
            {
                var itemSource = storeFile.GetDirectoryNames("*");
            }
        }


        string ReadSettings(string key)
        {
            IsolatedStorageSettings settings =
                IsolatedStorageSettings.ApplicationSettings;
            return settings[key].ToString();
        }

        void SaveSettings(string key, string value)
        {
            IsolatedStorageSettings settings =
                IsolatedStorageSettings.ApplicationSettings;
            settings.Add(key, value);
            settings.Save();
        }

        void ClearSettings()
        {
            IsolatedStorageSettings settings =
                IsolatedStorageSettings.ApplicationSettings;
            settings.Clear();
        }


        void ChangeIsolatedStorageSize()
        {
            using (IsolatedStorageFile storeFile =
                IsolatedStorageFile.GetUserStoreForApplication())
            {
                long oldSize = storeFile.AvailableFreeSpace;
                long newSize = 1024*1024*10;
                if (oldSize < newSize)
                {
                    storeFile.IncreaseQuotaTo(newSize);
                }
            }
        }