//Create DataRelation 
      DataRelation r = new DataRelation(string.Empty,dataSet11.Table1.campo1Column,dataSet11.Table2.campo1Column,false); 
      dataSet11.Relations.Add(r); 

      //Create Columns for JOIN table 
      for(int i = 0; i < dataSet11.Table1.Columns.Count; i++) 
      { 
        table.Columns.Add(dataSet11.Table1.Columns[i].ColumnName, dataSet11.Table1.Columns[i].DataType); 
      } 

      for(int i = 0; i < dataSet11.Table2.Columns.Count; i++) 
      { 
        //Beware Duplicates 
        if(!table.Columns.Contains(dataSet11.Table2.Columns[i].ColumnName)) 
          table.Columns.Add(dataSet11.Table2.Columns[i].ColumnName, dataSet11.Table2.Columns[i].DataType); 
        else 
          table.Columns.Add(dataSet11.Table2.Columns[i].ColumnName + "_Second", dataSet11.Table2.Columns[i].DataType); 
      } 


      //Loop through First table 
      table.BeginLoadData(); 

      foreach(DataRow firstrow in dataSet11.Tables[0].Rows) 
      { 
        //Get "joined" rows 
        DataRow[] childrows = firstrow.GetChildRows(r); 
        if(childrows != null && childrows.Length > 0) 
        { 
          object[] parentarray = firstrow.ItemArray; 
          foreach(DataRow secondrow in childrows) 
          { 
            object[] secondarray = secondrow.ItemArray; 
            object[] joinarray = new object[parentarray.Length+secondarray.Length]; 
            Array.Copy(parentarray,0,joinarray,0,parentarray.Length); 
            Array.Copy(secondarray,0,joinarray,parentarray.Length,secondarray.Length); 
            table.LoadDataRow(joinarray,true); 
          } 
        } 
        else 
        { 
          object[] parentarray = firstrow.ItemArray; 
          object[] joinarray = new object[parentarray.Length]; 
          Array.Copy(parentarray,0,joinarray,0,parentarray.Length); 
          table.LoadDataRow(joinarray,true); 
        } 
      } 
      table.EndLoadData(); 


      //Table pulito cleaned
      DataTable dtclean = this.dataSet11.Table1.Clone();  
      DataRowCollection rowCollection  = table.Rows;
      for (int i = 0; i < table.Rows.Count;i++)
      {
        
        if(table.Rows[i]["campo1_Second"].ToString()!= "")
        {
          rowCollection.Remove(table.Rows[i]);

          i--;
        }

        
      



      }