class ProcessFile
    {
         //省略部分代码
 public void FileProcessThread()
        {

            //.........省略部分代码
            //访问文件夹，获取文件列表并进行文件处理
            for (int i = 0; i < folderinfoTable.Rows.Count;i++ )
            {
                 Thread proProcess = new Thread(new ParameterizedThreadStart(mcdprofileProcess));
                    proProcess.Start(folderinfoTable.Rows[i]);

             }
         }
  void mcdprofileProcess(object objdr)
        {
            VersionManage versionmanage = new VersionManage(localdbconnstr);
            //........
            bool ismatch=versionmanage.CheckVersionmatch(mcdlocalfilelistforversion[0].FullName, mcdVersion);   
         }                     
}

线程方法调用的类：
class VersionManage
    {
        //数据库连接
        DBOperation dboperation;

        public VersionManage(string connectionstring)
        {
            dboperation = new DBOperation(connectionstring);
        }

public bool CheckVersionmatch(string filepath,string VersionName)
        {

            //获取该版本类型的数量的sql语句
            string getVernumstr = "SELECT COUNT(*) FROM(SELECT dbo.FILE_VERSION.Version_Name FROM dbo.FILE_VERSION GROUP BY Version_Name) AS temp WHERE temp.Version_Name='" + VersionName + "'";
           [color=#FF0000] object vernumobj = dboperation.ExecuateScalar(getVernumstr);[/color]           //.......................(省略）
         }
}