/// <summary>
/// 添加一个数据库的连接类型以及对应的链接字符串
/// </summary>
/// <typeparam name="T">数据库连接类型</typeparam>
/// <param name="connection_string">连接字符串</param>
public void AddConnection <T>(string connection_string)
{
Vasilier.AddConnection <T>(_key, connection_string);
}
