Boris/BorisProject/TrenerWindow.xaml

<Window x:Class="BorisProject.TrenerWindow"
        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:BorisProject"
        mc:Ignorable="d"
        Title="TrenerWindow" Height="450" Width="800" WindowStartupLocation="CenterScreen" WindowStyle="None" ResizeMode="NoResize">
    <Grid>
        <Grid.Background>
            <LinearGradientBrush EndPoint="0,0" StartPoint="0,0">
                <GradientStop Color="Black" Offset="0"/>
                <GradientStop Color="#FF0E5DA6" Offset="0.215"/>
            </LinearGradientBrush>
        </Grid.Background>
        <Label Content="Добро пожаловать на окно тренера" FontSize="25" HorizontalAlignment="Left" Margin="204,83,0,0" VerticalAlignment="Top"/>
        <Button Content="Соревнования" HorizontalAlignment="Left" VerticalAlignment="Top" Width="118" Height="53" Click="sorev_Click"/>
        <Grid Name="sorev" Visibility="Hidden" Margin="118,0,0,0" Background="#FFE0CCCC">
            <DataGrid Name="datasorev" HorizontalAlignment="Left" Height="249" Margin="10,191,0,0" VerticalAlignment="Top" Width="662"/>
            <Label Content="Соревнования" FontSize="25" HorizontalAlignment="Left" Margin="251,63,0,0" VerticalAlignment="Top" Width="184"/>
            <Button Content="Сформировать таблицу" HorizontalAlignment="Left" Margin="30,143,0,0" VerticalAlignment="Top" Width="147" Height="43" Click="showtablesorev_Click"/>
            <Button Content="Выгрузить таблицу в PDF" HorizontalAlignment="Left" Margin="205,143,0,0" VerticalAlignment="Top" Width="147" Height="43" Click="PDF_Click"/>
        </Grid>
        <Button Content="Тренировки" HorizontalAlignment="Left" VerticalAlignment="Top" Width="118" Height="53" Margin="0,53,0,0" Click="trenirovka_Click"/>
        <Grid Name="trenirovka" Visibility="Hidden" Margin="118,0,0,0" Background="#FFE0CCCC">
            <Label Content="Тренировки" FontSize="25" HorizontalAlignment="Left" Margin="251,63,0,0" VerticalAlignment="Top" Width="184"/>
            <Label Content="Код тренировки:" HorizontalAlignment="Left" Margin="341,216,0,0" VerticalAlignment="Top"/>
            <Label Content="Адрес тренировки:" HorizontalAlignment="Left" Margin="65,201,0,0" VerticalAlignment="Top"/>
            <Label Content="Дата тренировки:" HorizontalAlignment="Left" Margin="65,232,0,0" VerticalAlignment="Top"/>
            <TextBox Name="kodtrentxt" MaxLength="10" HorizontalAlignment="Left" Height="23" Margin="448,218,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="55"/>
            <TextBox Name="adrestrentxt" MaxLength="20" HorizontalAlignment="Left" Height="23" Margin="180,204,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
            <DatePicker Name="datetrenpic" HorizontalAlignment="Left" Margin="172,234,0,0" VerticalAlignment="Top"/>
            <DataGrid Name="trendata" HorizontalAlignment="Left" Height="187" Margin="291,253,0,0" VerticalAlignment="Top" Width="381"/>
            <Button Content="Добавить" HorizontalAlignment="Left" Margin="87,283,0,0" VerticalAlignment="Top" Width="78" Height="22" Click="AddTrenirovka_Click"/>
            <Button Content="Редактировать" HorizontalAlignment="Left" Margin="81,310,0,0" VerticalAlignment="Top" Width="91" Height="28" Click="UpdateTrenirovka_Click"/>
            <Button Content="Удалить" HorizontalAlignment="Left" Margin="86,343,0,0" VerticalAlignment="Top" Width="81" Height="26" Click="DeleteTrenirovka_Click"/>
            <Button Content="Сформировать таблицу" HorizontalAlignment="Left" Margin="529,211,0,0" VerticalAlignment="Top" Width="143" Height="35" Click="Showtabletrenirovka_Click"/>
        </Grid>
        <Button Content="Тренирующиеся" HorizontalAlignment="Left" VerticalAlignment="Top" Width="118" Height="53" Margin="0,106,0,0" Click="chel_Click"/>
        <Grid Name="chel" Visibility="Hidden" Margin="118,0,0,0" Background="#FFE0CCCC">
            <Label Content="Тренирующиеся" FontSize="25" HorizontalAlignment="Left" Margin="251,63,0,0" VerticalAlignment="Top" Width="202"/>
            <DataGrid Name="datapeople" HorizontalAlignment="Left" Height="224" Margin="10,180,0,0" VerticalAlignment="Top" Width="662"/>
            <Button Content="Сформировать таблицу" HorizontalAlignment="Left" Margin="40,138,0,0" VerticalAlignment="Top" Width="157" Height="37" Click="showctablechel_Click"/>
        </Grid>

        <Button Content="X" HorizontalAlignment="Left" FontSize="25" Margin="755,0,0,0" VerticalAlignment="Top" Width="45" Height="45" Click="Exit_Click"/>
        <TextBox Name="txtidtrener" Visibility="Hidden" HorizontalAlignment="Left" Height="23" Margin="10,400,0,0" TextWrapping="Wrap"  VerticalAlignment="Top" Width="120"/>
    </Grid>
</Window>