TRC20/WpfApp1TRC20/Views/MainWindow.xaml.cs

using System.Windows;
using System.Windows.Controls;
using WpfApp1TRC20.ViewModels;

namespace WpfApp1TRC20.Views
{
    public partial class MainWindow : Window
    {
        public MainWindow(MainViewModel viewModel)
        {
            InitializeComponent();
            DataContext = viewModel;
        }

        private void PrivateKeyBox_PasswordChanged(object sender, RoutedEventArgs e)
        {
            if (DataContext is MainViewModel vm && sender is PasswordBox pb)
            {
                vm.ImportPrivateKey = pb.Password;
            }
        }
    }
}