private void menuItemMainShowRelatedEntities_Click(object sender, EventArgs e) { if (lvwMain.SelectedItems.Count == 1) { var item = lvwMain.SelectedItems[0].Tag as Microsoft.VisualStudio.Modeling.ModelElement; var F = new nHydrate.DslPackage.Forms.TableExtendedPropertiesForm(item as nHydrate.Dsl.Entity, _diagram.CurrentDiagram); F.ShowDialog(); } }