WPFDialogs

<src:_ViewBase x:Class="MVVMDialogWithReturnProperty.MyDialogView"
               xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
               xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
               xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
               xmlns:src="clr-namespace:MVVMDialogWithReturnProperty" 
               mc:Ignorable="d" 
               d:DesignHeight="252" 
               d:DesignWidth="454">
    
    <UserControl.Resources>
        <Style TargetType="Button">
            <Setter Property="Width" Value="75"/>
            <Setter Property="Height" Value="30"/>
            <Setter Property="Margin" Value="2"/>
            <Setter Property="FontFamily" Value="Verdana"/>
            <Setter Property="FontSize" Value="11px"/>
        </Style>
    </UserControl.Resources>

    <Grid Margin="5">

        <DockPanel LastChildFill="True">

            <!--Lower Button Panel-->
            <StackPanel Orientation="Horizontal"
                    HorizontalAlignment="Right"
                    DockPanel.Dock="Bottom">

                <!--Save Button-->
                <Button Name="cmdSave"
                        Command="{Binding SaveCommand}"
                        Content="Save">
                </Button>

                <!--Cancel Button-->
                <Button Name="cmdCancel"
                        Command="{Binding CancelCommand}"
                        Content="Cancel">
                </Button>

            </StackPanel>

            <Grid>

                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"></RowDefinition>
                    <RowDefinition></RowDefinition>
                </Grid.RowDefinitions>

                <Grid Margin="5,5,5,5" Grid.Row="1">

                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="120"></ColumnDefinition>
                        <ColumnDefinition Width="*"></ColumnDefinition>
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"></RowDefinition>
                        <RowDefinition Height="Auto"></RowDefinition>
                        <RowDefinition Height="Auto"></RowDefinition>
                    </Grid.RowDefinitions>

                    <Label Name="lblTitle"
                            Content="Title:"
                            FontFamily="Arial"
                            Grid.Column="0" 
                            Grid.Row="0" 
                            HorizontalAlignment="Right"
                            FontSize="14"/>
                    <TextBox Name="txtTitle" 
                            Margin="5,2,5,2"
                            Text="{Binding Path=Title, Mode=TwoWay}"
                            Grid.Column="2" 
                            Grid.Row="0" 
                            VerticalAlignment="Top"
                            FontSize="12"/>

                    <!-- User Name-->
                    <Label Name="lblAge"
                            Content="Age:"
                            FontFamily="Arial"
                            Grid.Column="0" 
                            Grid.Row="1" 
                            HorizontalAlignment="Right"
                            FontSize="14"/>
                    <TextBox Name="txtAge" 
                            Margin="5,2,5,2"
                            Text="{Binding Path=Age, Mode=TwoWay}"
                            Grid.Column="1" 
                            Grid.Row="1"
                            VerticalAlignment="Top"
                            FontSize="12"/>
                    
                </Grid>

            </Grid>

        </DockPanel>

    </Grid>
    
</src:_ViewBase>