esoft/esoft/Pages/ServicesPage.xaml

<Page x:Class="esoft.Pages.ServicesPage"
      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:esoft.Pages"
      mc:Ignorable="d" 
      d:DesignHeight="1000"
      Title="Список задач" Width="1920">

    <Grid Width="1920">
        <Grid.RowDefinitions>
            <RowDefinition Height="50"/>
            <RowDefinition Height="30"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="70"/>
        </Grid.RowDefinitions>

        <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
            <ComboBox Margin="5" Width="200" Height="25"
                      Name="ComboSortBy" FontSize="16">
                <ComboBoxItem Content="По возрастанию даты"/>
                <ComboBoxItem Content="По убыванию даты"/>
            </ComboBox>
            <ComboBox Margin="5" Width="200" Height="25" Name="ComboManager" DisplayMemberPath="" FontSize="16">

            </ComboBox>
            <ComboBox Margin="5" Width="200" Height="25" Name="ComboExecutor" DisplayMemberPath="" FontSize="16">

            </ComboBox>
            <ComboBox Margin="5" Width="200" Height="25" Name="ComboStatus" FontSize="16" DisplayMemberPath="Name"></ComboBox>
            <TextBox Height="25" Name="TBoxSearch" Width="200" Margin ="5" FontSize="16"/>
        </StackPanel>
        <TextBlock Grid.Row="1" Width="auto" FontWeight="Bold" Name="BlockRecords"/>

        <DataGrid x:Name="DGridTask" Width="1850" Height="790" HorizontalAlignment="Center" VerticalAlignment="Top" Grid.Row="2" FontSize="25" AutoGenerateColumns="False" IsReadOnly="True">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Название задачи" Binding="{Binding Title}" Width="750"></DataGridTextColumn>
                <DataGridTextColumn Header="Дата задачи" Binding="{Binding CreateDateTime, StringFormat=\{0:dd.MM.yyyy\}}" Width="160"></DataGridTextColumn>
                <DataGridTextColumn Header="Исполнитель" Binding="{Binding FioUser}" Width="331"></DataGridTextColumn>
                <DataGridTextColumn Header="Менеджер" Binding="{Binding FioManager}" Width="331"></DataGridTextColumn>
                <DataGridTextColumn Header="Статус" Binding="{Binding Status}" Width="220"></DataGridTextColumn>
                
                <DataGridTemplateColumn Width="50">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Button x:Name="BtnEdit" Content="📝" Click="BtnEdit_Click" BorderThickness="0" Background="#87d3ff"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
            </DataGrid.Columns>

        </DataGrid>

        <Button Grid.Row="3" HorizontalAlignment="Left" Name="BtnDeleteTask" Content="Удалить задачу" Width="196" Height="NaN" BorderThickness="0" Style="{StaticResource  StandartButtons}" Margin="1650,10,0,15" Click="BtnDeleteTask_Click">
            <Button.Resources>
                <Style TargetType="Border">
                    <Setter Property="CornerRadius" Value="10"/>
                </Style>
            </Button.Resources>
        </Button>

        <Button Grid.Row="3" HorizontalAlignment="Left" Name="BtnAddTask" Content="Добавить задачу" Width="196" Height="NaN" BorderThickness="0" Style="{StaticResource  StandartButtons}" Margin="1420,10,0,15" Click="BtnAddTask_Click">
            <Button.Resources>
                <Style TargetType="Border">
                    <Setter Property="CornerRadius" Value="10"/>
                </Style>
            </Button.Resources>
        </Button>
    </Grid>
</Page>