xamarin SQLite路径

xamarin使用SQLite时对应的访问路径各个平台不一样，需要单独引用。下面各平台罗列代码：

Windows8.1:

public SQLiteConnection GetConnection(string dbName) {
            var sqliteFilename = string.Format("{0}.db3", dbName);
            string documentsPath = global::Windows.Storage.ApplicationData.Current.LocalFolder.Path; 

            var path = Path.Combine(documentsPath, sqliteFilename);
            return new SQLite.SQLiteConnection(path);
        }

UWP:

public SQLiteConnection GetConnection(string dbName) {
            var sqliteFilename = string.Format("{0}.db3", dbName);
            string documentsPath = global::Windows.Storage.ApplicationData.Current.LocalFolder.Path; 

            var path = Path.Combine(documentsPath, sqliteFilename);
            return new SQLite.SQLiteConnection(path);
        }

Android:

public SQLite.SQLiteConnection GetConnection(string dbName)
        {
            var sqliteFilename = string.Format("{0}.db3", dbName);
            string documentsPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
            var path = Path.Combine(documentsPath, sqliteFilename);
            return new SQLite.SQLiteConnection(path);
        }

IOS:

public SQLite.SQLiteConnection GetConnection(string dbName)
        {
            var sqliteFilename = string.Format("{0}.db3", dbName);
            string documentsPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal); // Documents folder
            string libraryPath = Path.Combine(documentsPath, "..", "Library"); // Library folder
            var path = Path.Combine(libraryPath, sqliteFilename);
           return new SQLite.SQLiteConnection(path);
        }