linq2db“Configuration string is not provided”

linq2db升级到5.1.1后，出现异常：

LinqToDB.LinqToDBException:"Invalid configuration,Configuration string is not provided."

解决：

1,在app.config中添加：

    <connectionStrings>
        <add name="myDB" connectionString="Data Source=D:\\path\\sqlite.db" providerName="SQLite" />
    </connectionStrings>

2,修改SQLite.tt中的DefaultConfiguration行，去掉注释并修改为

    DefaultConfiguration                = "myDB";            // use default configuration