private void Edit_Contract_Click(object sender, RoutedEventArgs e)
{
EditContract manage_Contracts = new EditContract();
manage_Contracts.Show();
Close();
}
public void Execute(object parameter)
{
var mainViewModel = parameter as MainViewModel;
editContractView = new EditContract(mainViewModel);
editContractView.Owner = Application.Current.MainWindow;
editContractView.WindowStartupLocation = WindowStartupLocation.CenterOwner;
mainViewModel.Refresh = editContractView.ShowDialog();
}