private void On_MainVM_CommandAction(MainVM sender, MainVM.CommandKey cmdKey)
{
switch (cmdKey)
{
case MainVM.CommandKey.Attach:
sender.AttachExt(TXTBOX_Ext.Text);
break;
case MainVM.CommandKey.Detach:
if (LV_ExtList.SelectedItem != null)
{
string selExtName = LV_ExtList.SelectedItem as string;
sender.DetachExt(selExtName);
}
break;
default:
break;
}
}