C# 给多线程传递参数

public void ThreadMethod(object ParObject)
{
List<string> stid = null;
SqlConnection con = null;
SqlCommand cmd = null;
toExport_Mutex.whatOperation optin = new toExport_Mutex.whatOperation();

try
{
object[] objArray = (object[])ParObject;
stid = (List<string>)objArray[0];
con = (SqlConnection)objArray[1];
cmd = (SqlCommand)objArray[2];
optin = (toExport_Mutex.whatOperation)objArray[3];
}
catch (Exception ex)
{ }
UpdateSQL(stid, con, cmd, optin);
}

void MainUpdate(List<string> listTids, SqlConnection conn, SqlCommand cmd, toExport_Mutex.whatOperation op)
{
ParameterizedThreadStart pts = new ParameterizedThreadStart(ThreadMethod);
Thread t = new Thread(pts);
object o = new object[] { listTids, conn, cmd, op };
t.Start(o);
}