Добавьте файлы проекта.

zooManagerPro/Views/LoginView.axaml

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+<ContentPage xmlns="https://github.com/avaloniaui"
+             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:viewmodels="using:zooManagerPro.ViewModels"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="zooManagerPro.LoginView"
+             x:DataType="viewmodels:LoginViewModel"
+             Header="Вход">
+   <Grid ColumnDefinitions="*,*,*" RowDefinitions="*,*,*">
+	   <StackPanel Grid.Column="1" Grid.Row="1">
+		   <StackPanel Margin="5">
+			   <TextBlock Text="Login"/>
+               <TextBox Name="LoginTextBox" PlaceholderText="ivan" Text="{Binding Login}"/>
+           </StackPanel>
+           <StackPanel Margin="5">
+			   <TextBlock Text="Password"/>
+               <TextBox Name="PasswordTextBox" PlaceholderText="1234" Text="{Binding Password}"/>
+           </StackPanel>
+           <Button Name="ButtonTextBox" Margin="5" HorizontalAlignment="Center" Content="Войти" Command="{Binding EntranceCommand}"/>
+       </StackPanel>
+   </Grid>
+</ContentPage>