Avalonia/samples/Generators.Sandbox/Controls/SignUpView.xaml

<UserControl xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:controls="using:Generators.Sandbox.Controls"
        xmlns:vm="clr-namespace:Generators.Sandbox.ViewModels"
        x:Class="Generators.Sandbox.Controls.SignUpView"
        x:DataType="vm:SignUpViewModel">
        <UserControl.Styles>
            <Style Selector="DataValidationErrors">
                <Setter Property="ErrorTemplate">
                  <Setter.Value>
                    <DataTemplate />
                  </Setter.Value>
                </Setter>
            </Style>
        </UserControl.Styles>
        <StackPanel>
        <controls:CustomTextBox Margin="0 10 0 0"
                 x:Name="UserNameTextBox"
                 Text="{Binding UserName}"
                 Watermark="Please, enter user name..."
                 UseFloatingWatermark="True" />
        <TextBlock x:Name="UserNameValidation"
                   Text="{Binding UserNameValidation}"
                   Foreground="Green"
                   FontSize="12" />
        <TextBox Margin="0 10 0 0"
                 x:Name="PasswordTextBox"
                 Text="{Binding Password}"
                 Watermark="Please, enter your password..."
                 UseFloatingWatermark="True"
                 PasswordChar="*" />
        <TextBlock x:Name="PasswordValidation"
                   Text="{Binding PasswordValidation}"
                   Foreground="Red"
                   FontSize="12" />
        <TextBox Margin="0 10 0 0"
                 x:Name="ConfirmPasswordTextBox"
                 Text="{Binding ConfirmPassword}"
                 Watermark="Please, confirm the password..."
                 UseFloatingWatermark="True"
                 PasswordChar="*" />
        <TextBlock x:Name="ConfirmPasswordValidation"
                   Text="{Binding ConfirmPasswordValidation}"
                   TextWrapping="Wrap"
                   Foreground="Red"
                   FontSize="12" />
        <TextBlock Text="Press the button below to sign up." />
        <Button Margin="0 10 0 5"
                Content="Sign up"
                Command="{Binding SignUp}"
                x:Name="SignUpButton" />
        <TextBlock x:Name="CompoundValidation"
                   TextWrapping="Wrap"
                   Foreground="Red"
                   FontSize="12"
                   Text="{Binding CompoundValidation}" />
    </StackPanel>
</UserControl>