School/SchoolProject/WorkOfEmployeePage.xaml

<Page x:Class="SchoolProject.WorkOfEmployeePage"
      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:local="clr-namespace:SchoolProject"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="Добавление сотрудника" Style="{StaticResource MainPage}">

    <Grid>
        <StackPanel Margin="150,0,150,0" VerticalAlignment="Center">
            <TextBlock Text="Фамилия" Margin="5"></TextBlock>
            <TextBox Text="{Binding LastName}" Margin="5"></TextBox>
            
            <TextBlock Text="Имя" Margin="5"></TextBlock>
            <TextBox Text="{Binding Name}" Margin="5"></TextBox>

            <TextBlock Text="Отчество" Margin="5"></TextBlock>
            <TextBox Text="{Binding MiddleName}" Margin="5"></TextBox>

            <TextBlock Text="Дата рождения" Margin="5"></TextBlock>
            <DatePicker SelectedDate="{Binding BirthDate}" Margin="5"></DatePicker>

            <TextBlock Text="Должность" Margin="5"></TextBlock>
            <ComboBox Name="CmbPosition" SelectedItem="{Binding Position}" DisplayMemberPath="PositionName" Margin="5"></ComboBox>

            <TextBlock Text="Подразделение" Margin="5"></TextBlock>
            <ComboBox Name="CmbSubdivision" SelectedItem="{Binding Subdivision}" DisplayMemberPath="SubdivisionName" Margin="5"></ComboBox>

            <Button x:Name="BtnAddOrEditEmployee" Click="BtnAddOrEditEmployee_Click">Добавить</Button>
        </StackPanel>
    </Grid>
</Page>