在上传CSV文件时使用MySQL在C＃中连接太多

Question

当我尝试将数据从CSV文件插入MYSQL数据库时，我想知道如何解决这种错误。以下是我的代码：

while (null != (sLine = __reader.ReadLine()))
{
    while (rexRunOnLine.IsMatch(sLine) && null != (sNextLine = __reader.ReadLine()))
    {
        sLine += "\n" + sNextLine;

        __rowno++;
        string[] values = rexCsvSplitter.Split(sLine);


        billOfMaterials.Allotment_code = values[0];
        billOfMaterials.category_name = values[1];
        billOfMaterials.activity = values[2];
        billOfMaterials.quantity = values[3];
        billOfMaterials.end_unit_quantity = values[4];
        billOfMaterials.unit = values[5];
        billOfMaterials.description = values[6];
        billOfMaterials.unit_cost = values[7];
        billOfMaterials.regular_labor_cost = values[8];
        billOfMaterials.end_unit_labor_cost = values[9];
        billOfMaterials.type = values[10];
        billOfMaterials.batch = int.Parse(values[11]);
        billOfMaterials.AddBillOfMaterials();

        yield return values;
    }

    __reader.Close();
}

这是我遇到的错误：

Too many Connections