WPF_Practice/PacticeSolution/CommandPatternSample/MainWindow.xaml

<Window x:Class="CommandPatternSample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:CommandPatternSample"
        xmlns:vm="clr-namespace:CommandPatternSample.ViewModel"
        mc:Ignorable="d"
        Title="MainWindow" Height="300" Width="400"
        FocusManager.FocusedElement="{Binding ElementName=tbName}">
    <Window.DataContext>
        <vm:EmpViewModel/>
    </Window.DataContext>
    
    <StackPanel Margin="10">
        <TextBlock Text="Enter the employee name."/>
        <TextBox x:Name="tbName"
                 Text="{Binding SelectedEmp.Name}">
            <TextBox.InputBindings>
                <KeyBinding Key="Enter"
                            Command="{Binding AddEmpCommand}"
                            CommandParameter="{Binding ElementName=tbName,Path=Text}"/>
            </TextBox.InputBindings>
        </TextBox>
        <Button Content="Add"
                Command="{Binding AddEmpCommand}"
                CommandParameter="{Binding ElementName=tbName, Path=Text}"/>
        <ListBox x:Name="lbEmps" 
                 ItemsSource="{Binding Emps}"
                 SelectedItem="{Binding SelectedEmp}"
                 DisplayMemberPath="Name"/>
        <Label Height="40" Width="150" HorizontalAlignment="Center"
               Content="{Binding ElementName=lbEmps, Path=SelectedItem}"/>
    </StackPanel>
</Window>