RadComboBox causes memory leak in WPF

[Rajesh]

I have used RadComboBoxes inside a Grid in my WPF application as shown below.

<tk:RadComboBox Grid.Row="3" Grid.Column="3" Style="{StaticResource DropDown}" x:Name="cmbColor" Height="25" Margin="5,5,5,5" DropDownOpened="cmbColor_DropDownOpened"

IsEditable="False" SelectedValue="{Binding PR_COLOR}" MaxWidth="250"

ItemTemplate="{StaticResource DropDownCodeMeaning}"  />


I am binding the data to the combo box when the user clicked on the combo box to select an item from it.
I have used the  event "DropDownOpened" to bind data to this combo box.

Below shown is the code behind.

// set the dropdown list for a combobox to all entities for a business object

  private void SetDropDown<BusObj, BusEntity>(RadComboBox cmb, ref BusObj busobj)

      where BusObj : BusinessObject<BusEntity>, new()

      where BusEntity : BusinessEntity, new()

  {

      if (busobj == null)

      {

          busobj = new BusObj();

      }

      if (cmb.ItemsSource == null)

      {

          var RecordList = busobj.GetAllEntities();

          if (RecordList.Count > 0)

              RecordList.ApplySort("SortKey", ListSortDirection.Ascending);

          cmb.ItemsSource = RecordList;

 

      }

  }

After sets the Items Source for the combo box, the memory increases rapidly. Anyone knows why this happens?
Please help me. I am using the telerik version 2010.1.603.35.

Thanks in advance,
Rajesh V R