123/Matvey/Museum/Museum/AdminPanel.xaml

<Window x:Class="Museum.AdminPanel"
        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:Museum"
        mc:Ignorable="d"
        Title="Админ панель \ Добавление новых мероприятий!" Height="450" Width="800" MinHeight="450" MinWidth="800">
    <Grid Background="#545252">
        <Grid.RowDefinitions>
            <RowDefinition Height="50"></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <StackPanel Grid.Row="0" Orientation="Horizontal">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="380"></ColumnDefinition>
                    <ColumnDefinition></ColumnDefinition>
                    <ColumnDefinition></ColumnDefinition>
                </Grid.ColumnDefinitions>

                <Label x:Name="WelcomeText" Content="Здравствуйте," Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="25" FontWeight="Bold"></Label>
                <Button Margin="5" Grid.Column="2" Height="40" Width="100" Content="Выйти" Background="#5D5C5C" Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="25" FontWeight="Bold" Click="Button_Click_1"></Button>
                <Button Margin="5" Grid.Column="1" Height="40" Width="290" Content="Создать мероприятие" Background="#5D5C5C" Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="25" FontWeight="Bold" Click="Button_Click"></Button>
                
            </Grid>
        </StackPanel>

        <StackPanel Grid.Row="1">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="350"></ColumnDefinition>
                    <ColumnDefinition></ColumnDefinition>
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                </Grid.RowDefinitions>

                <Label Grid.Row="0" Content="Название мероприятия:" Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="20" FontWeight="Bold"></Label>
                <Label Grid.Row="1" Content="Описание мероприятия:" Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="20" FontWeight="Bold"></Label>
                <Label Grid.Row="2" Content="Дата мероприятия:" Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="20" FontWeight="Bold"></Label>
                <Label Grid.Row="3" Content="Кол-во мест:" Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="20" FontWeight="Bold"></Label>
                <Label Grid.Row="4" Content="Цена билета:" Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="20" FontWeight="Bold"></Label>
                <Label Grid.Row="5" Content="Номер для уточнения времяни:" Foreground="#EAD0D0" FontFamily="Comic Sans MS" FontSize="20" FontWeight="Bold"></Label>

                <TextBox x:Name="NameEvent" Grid.Row="0" FontFamily="Comic Sans MS" FontSize="23" Grid.Column="2" Background="Gray" Margin="10,10,10,10"></TextBox>
                <TextBox x:Name="DiscriptEvent" Grid.Row="1" FontFamily="Comic Sans MS" FontSize="23" Grid.Column="2" Background="Gray" Margin="10,10,10,10"></TextBox>
                <DatePicker x:Name="DateEvent" Grid.Row="2" Grid.Column="2" Margin="10,10,10,10"></DatePicker>
                <TextBox x:Name="ColvoMestEvent" Grid.Row="3" FontFamily="Comic Sans MS" FontSize="23" Grid.Column="2" Background="Gray" Margin="10,10,10,10"></TextBox>
                <TextBox x:Name="PriceEvent" Grid.Row="4" FontFamily="Comic Sans MS" FontSize="23" Grid.Column="2" Background="Gray" Margin="10,10,10,10"></TextBox>
                <TextBox x:Name="PhoneNumEvent" Grid.Row="5" FontFamily="Comic Sans MS" FontSize="23" Grid.Column="2" Background="Gray" Margin="10,10,10,10"></TextBox>
            </Grid>
        </StackPanel>
    </Grid>
</Window>