ParentRelations.Add() desn't work from time to time ...

[Andrzej]

I have some problem with binding two tables in DataGrid control.

when I run my code when TEST ( SIMULATE ) is active it works perfect.
when I switch to real system it doesn't work, the code has deadlock in placed marked as "DeadLock heare"
my english is poor, so please have a look on my part of code.

public class Form1 : System.Windows.Forms.Form
{
  ...

  private void ShowLogsValue()
  {
     // for Test only, DataTable is loaded with some random data
     if ( SIMULATE_ACTIVE )
     {
       m_threadLoadData = new Thread ( new ThreadStart( oradb.GetLogsORAData_TEST ));
       m_threadLoadData.Name = "LOAD_DATA";
       m_threadLoadData.Start();
       m_threadLoadData.Join(); 
       this.Binde2Tables(); 
       return;
     }

    // real process, DataTable is loaded by OdbcDataReader Read() method
    m_threadLoadData = new Thread(new ThreadStart( oradb.GetLogsORAData ));
    m_threadLoadData.Name = "LOAD_DATA";
    m_threadLoadData.Start();
    m_threadLoadData.Join(); 
    this.Binde2Tables(); 
  }

  public void Binde2Tables()
  {
    DataRelation myDataRelation;
    DataColumn parentColumn;
    DataColumn childColumn;
    parentColumn = oradb.dsLogsORA.Tables["LogsOracle"].Columns["LogID"];
    childColumn = oradb.dsLogsORA.Tables["LogsOracleData"].Columns["LOGS_ID"];
    myDataRelation = new DataRelation("WartościLogu", parentColumn, childColumn);
    oradb.dsLogsORA.Tables["LogsOracleData"].ParentRelations.Add(myDataRelation);
    m_dGrid1.SetDataBinding(oradb.dsLogsORA,"LogsOracle");
  }

...
}

public class OraDB
{

  public void GetLogsORAData()
  {
     while ( myReader.Read() ) 
     {
      ...
     }
    
    DeadLock here 
    myReader.Close();
     ....
  }


  public void GetLogsORAData_TEST()
  {
    // for Test only, to consume some CPU time
      for(int i = 0; i <= 99999999; i ++)
      {
         test ++;
      }
      ...
   }
 
}    ....

Could you please help me with this bug ?

Thanks in advance

Andrzej Falk