Mono.Data.Sqlite.SqliteConnection.SetPassword C# (CSharp) Method

    public void SetPassword(byte[] databasePassword)
    {
      if (_connectionState != ConnectionState.Closed)
        throw new InvalidOperationException("Password can only be set before the database is opened.");

      if (databasePassword != null)
        if (databasePassword.Length == 0) databasePassword = null;

      _password = databasePassword;
    }

 public void CreateDataBase(string dbPath, string pwd)
 {
     if (!File.Exists(dbPath))
     {
         SqliteConnection.CreateFile(dbPath);
         if (string.IsNullOrEmpty(pwd))
         {
             using (SqliteConnection conn = new SqliteConnection("Data Source=" + dbPath))
             {
                 try
                 {
                     conn.SetPassword(pwd);
                 }
                 catch
                 {
                     conn.Close();
                     throw;
                 }
                 finally
                 {
                     conn.Close();
                 }
             }
         }
     }
     else
         throw new Exception("已经存在名叫：" + dbPath + "的数据库！");
 }