public VMOperationToolStripMenuSubItem(VMOperationCommand command)
 {
     Util.ThrowIfParameterNull(command, "command");
     Command = command;
     Enabled = command != null && command.CanExecute();
 }
 public VMOperationToolStripMenuSubItem(VMOperationCommand command)
 {
     Util.ThrowIfParameterNull(command, "command");
     Command = command;
 }
 public VMOperationToolStripMenuSubItem(VMOperationCommand command)
 {
     Util.ThrowIfParameterNull(command, "command");
     Command = command;
 }