private void btnSelect_Click(object sender, EventArgs e)
        {
            if (!Organization.IsEntityAttributesLoaded(EntityName))
            {
                var progForm = new WebServiceProgressForm(this);
                OrganizationHelper.LoadAttributeList(Organization, EntityName, progForm.ProgressIndicator);

                if (Organization.AttributeLoadException != null)
                {
                    ErrorMessageForm.ShowErrorMessageBox(this, "Unable to load attribute list", "Attribute List Error",
                                                         Organization.AttributeLoadException);
                    return;
                }
            }

            var selectorForm = new AttributeSelectionForm(UpdateParameters, m_org,
                                                          Organization.RetrieveEntityAttributes(EntityName), m_attributeList, m_allAttributes);

            selectorForm.ShowDialog();
        }