User Class

  public class User {

        [PrimaryKey, AutoIncrement]
        public int Id { get; set; }

        public string Name { get; set; }

        public string Email { get; set; }

        public string Address { get; set; }

        public override string ToString() {
            return $"{Name}";
        }
        public User() { }
    }
}
 MainWindowsVM

        public List<User> Users { get; set; }
        public ICommand OpenDialogCommand { get; set; }
        public ICommand CloseCommand { get; set; }
        public ICommand MinimizeCommand { get; set; }
        public ICommand MaximizeCommand { get; set; }

        public MainWindowViewModel() {

            Users = new List<User>();
            OpenDialogCommand = new OpenDialogCommand(this);
            CloseCommand = new CloseCommand(this);
            MinimizeCommand = new MinimizeCommand(this);
            MaximizeCommand = new MaximizeCommand(this);

        }

        internal void OpenDialog() {

            var dialog = new InputDialog();
            dialog.ShowDialog();

            Users = Operation.Read();

        }

        internal void Close(object obj) {
            Window win = obj as Window;

            win.Close();
        }
        internal void Maximize(object obj) {
            Window win = obj as Window;

            x++;

            win.WindowState = WindowState.Maximized;

            if (x % 2 == 0) {

                win.WindowState = WindowState.Normal;
            }
        }
        internal void Minimize(object obj) {
            Window win = obj as Window;

            win.WindowState = WindowState.Minimized;
        }
    }

InputDialogMV

   public User User { get; set; }
        public CloseDialogCommand CloseDialogCommand { get; set; }
        public SaveCommand SaveCommand { get; set; }

        public InputViewModel() {
            SaveCommand = new SaveCommand(this);
            CloseDialogCommand = new CloseDialogCommand(this);
            User = new User();
        }


        internal void CloseDialog(Window window) {
            window.Close();
            Operation.Read();
        }

        internal void Save(Window window) {
            Operation.Insert(User);
            window.Close();
        }

main XAML


    <Window.Resources>
        <vm:MainWindowViewModel x:Key="vm" />
    </Window.Resources>

    <Grid DataContext="{StaticResource vm}">
        <Grid.RowDefinitions>
            <RowDefinition Height="auto" />
            <RowDefinition Height="auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <Border x:Name="WindowCommandBar"
                Background="Transparent"
                MouseDown="WindowCommandBar_MouseDown">
            <Grid>
                <materialDesign:ColorZone Mode="PrimaryDark">
                    <StackPanel HorizontalAlignment="Right">
                        <Button materialDesign:ShadowAssist.ShadowDepth="Depth4"
                                Width="30"
                                Height="30"
                                Padding="0"
                                Command="{Binding CloseCommand}"
                                CommandParameter="{Binding ElementName=Main}">
                            <materialDesign:PackIcon Kind="WindowClose" />
                        </Button>
                    </StackPanel>
                </materialDesign:ColorZone>
            </Grid>
        </Border>
        <StackPanel Margin="10"
                    Orientation="Horizontal"
                    Grid.Row="1">
            <Button materialDesign:ShadowAssist.ShadowDepth="Depth4"
                    Width="30"
                    Height="30"
                    Padding="0"
                    Command="{Binding OpenDialogCommand}">
                <materialDesign:PackIcon Kind="UserAdd" />
            </Button>
            <Button materialDesign:ShadowAssist.ShadowDepth="Depth4"
                    Margin="20,0,0,0"
                    Height="30"
                    Width="100"
                    Padding="0"
                    Content="Send Invoice"

                 >
            </Button>
        </StackPanel>
        <Grid Margin="0,50,0,0" Grid.Row="2">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="auto" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <ListView ItemsSource="{Binding Users}">
            </ListView>
            <Grid Grid.Column="2">
                <Grid.RowDefinitions>
                    <RowDefinition Height="auto" />
                    <RowDefinition Height="auto" />
                    <RowDefinition Height="auto" />
                </Grid.RowDefinitions>
                <StackPanel Margin="10"
                            Grid.Column="1"
                            Orientation="Horizontal">
                    <materialDesign:PackIcon Kind="UserBox"
                                             VerticalAlignment="Center" />
                    <TextBlock Text="Name"
                               VerticalAlignment="Center" />
                </StackPanel>
                <StackPanel Margin="10"
                            Grid.Column="1"
                            Grid.Row="1"
                            Orientation="Horizontal">
                    <materialDesign:PackIcon Kind="Email"
                                             VerticalAlignment="Center" />
                    <TextBlock Text="Email"
                               VerticalAlignment="Center" />
                </StackPanel>
                <StackPanel Margin="10"
                            Grid.Column="1"
                            Grid.Row="2"
                            Orientation="Horizontal">
                    <materialDesign:PackIcon Kind="Home"
                                             VerticalAlignment="Center" />
                    <TextBlock Text="Adress"
                               VerticalAlignment="Center" />

                </StackPanel>
            </Grid>

        </Grid>
    </Grid>