Anchoring isofields has been added

StructureHelper/Windows/Errors/ErrorMessage.xaml

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+<Window x:Class="StructureHelper.Windows.Errors.ErrorMessage"
+        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:StructureHelper.Windows.Errors"
+        xmlns:vm="clr-namespace:StructureHelper.Windows.ViewModels.Errors"
+        d:DataContext="{d:DesignInstance vm:ErrorProcessor}"
+        mc:Ignorable="d"
+        Title="Error Message" ResizeMode="NoResize" WindowStartupLocation="CenterScreen" Width="500" Height="300">
+    <Grid>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="1"/>
+            <ColumnDefinition/>
+        </Grid.ColumnDefinitions>
+        <!--<Image Source="IconBug128.png"/>-->
+        <TabControl Grid.Column="1" x:Name="tabControl">
+            <TabItem Header="Short information" Margin="0">
+                <Grid Background="#FFE5E5E5">
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="50"/>
+                        <RowDefinition/>
+                    </Grid.RowDefinitions>
+                    <TextBlock x:Name="HeaderText" TextWrapping="Wrap" Text="Happened something wrong" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="24" FontWeight="Bold"/>
+                    <TextBlock Grid.Row="1" x:Name="MainText" TextWrapping="Wrap" Text="{Binding ShortText}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                </Grid>
+            </TabItem>
+            <TabItem Header="Detailed Information">
+                <Grid Background="#FFE5E5E5">
+                    <ScrollViewer>
+                        <TextBlock x:Name="ExtendedText" TextWrapping="Wrap" Text="{Binding DetailText}"/>
+                    </ScrollViewer>
+                </Grid>
+            </TabItem>
+        </TabControl>
+    </Grid>
+</Window>

StructureHelper/Windows/Errors/ErrorMessage.xaml.cs

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+using StructureHelper.Windows.ViewModels.Errors;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Shapes;
+
+namespace StructureHelper.Windows.Errors
+{
+    /// <summary>
+    /// Логика взаимодействия для ErrorMessage.xaml
+    /// </summary>
+    public partial class ErrorMessage : Window
+    {
+        ErrorProcessor vm;
+        public ErrorMessage(ErrorProcessor errorProcessor)
+        {
+            vm = errorProcessor;
+            this.DataContext = vm;
+            InitializeComponent();
+        }
+    }
+}