ui.xaml

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Generate Sheets from Excel" 
        Width="500"
        Height="350"
        ResizeMode="NoResize" 
        x:Uid="wind" 
        x:Name="Windo"
        
        Background="#FF403F3D" 
        >
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Rectangle HorizontalAlignment="Left" Height="321" Stroke="Black" VerticalAlignment="Top" Width="238" Grid.ColumnSpan="3" Grid.RowSpan="4" Fill="#FFFFD11A" Margin="10,0,0,-0.2" RenderTransformOrigin="0.5,0.5">
            <Rectangle.RenderTransform>
                <TransformGroup>
                    <ScaleTransform/>
                    <SkewTransform AngleY="-0.236"/>
                    <RotateTransform/>
                    <TranslateTransform Y="-0.396"/>
                </TransformGroup>
            </Rectangle.RenderTransform>
        </Rectangle>
        <!--Left side content-->
        <Label  Content="Sheets names:"
                Grid.Row="0"
                Grid.ColumnSpan="2" 
                HorizontalAlignment="Center" 
                VerticalAlignment="Center" 
                FontFamily="Arial" 
                Foreground="Black" 
                Margin="24,75,66.2,57.8" 
                Width="157" Grid.RowSpan="2" Height="28" FontSize="13"
                />
        <Label  Content="Sheets numbers:"
                Grid.Row="2"
                Grid.ColumnSpan="2" 
                HorizontalAlignment="Center" 
                VerticalAlignment="Center" 
                FontFamily="Arial" 
                Foreground="Black" 
                Margin="24,18.2,66.2,31.8" Width="157" Height="30" FontSize="13"
                />
        <!--Right side content-->
        <Image Source="C:\Users\User\Desktop\Logo\xaml.png" 
               Grid.Row="0"
               Grid.Column="2"
               Grid.ColumnSpan="4" 
               Grid.RowSpan="3"
               HorizontalAlignment="Center" 
               VerticalAlignment="Top" 
               RenderTransformOrigin="0.5,0.5" >
            <Image.RenderTransform>
                <TransformGroup>
                    <ScaleTransform ScaleX="0.5" ScaleY="0.5"/>
                    <SkewTransform/>
                    <RotateTransform/>
                    <TranslateTransform/>
                </TransformGroup>
            </Image.RenderTransform>
        </Image>

        <Button Grid.Row="3" 
                Grid.Column="2"
                Grid.ColumnSpan="2"                
                FontSize="14" 
                FontFamily="ISOCPEUR"                
                Click="bu1_click"
                ClickMode="Press"            
                Margin="57.8,0.2,57.6,44.8" 
                Background="#FF8B8C8A"
                Content="Ready"
                Cursor="Hand"/>
        <Label  Content="First cell"
            Grid.Row="2" 
            HorizontalAlignment="Center" 
            VerticalAlignment="Center" 
            FontFamily="Arial" 
            Foreground="Black" 
            Margin="30,42.2,15.2,5.8" Width="78" Height="32" FontSize="13"
                />
        <Label  Content="Last cell"
            Grid.Row="2" 
            HorizontalAlignment="Center" 
            VerticalAlignment="Center" 
            FontFamily="Arial" 
            Foreground="Black" 
            Margin="30,74.2,15.2,56.8" 
            Width="78" Height="29" Grid.RowSpan="2" FontSize="13"
                />
        <Label  Content="Last cell"
            Grid.Row="1" 
            HorizontalAlignment="Center" 
            VerticalAlignment="Center" 
            FontFamily="Arial" 
            Foreground="Black" 
            Margin="30,53,15.2,76.8" 
            Width="78" Grid.RowSpan="2" Height="31" FontSize="13"
                />
        <Label  Content="First cell" 
            HorizontalAlignment="Center" 
            VerticalAlignment="Center" 
            FontFamily="Arial" 
            Foreground="Black" 
            Margin="30,21,25.2,30.8" 
            Width="68" Grid.Row="1" Height="29" FontSize="13"
                />
        <TextBox 
            x:Name="textbox_shtN"
            Margin="39.8,39,18.2,19" FontFamily="ISOCPEUR" Grid.Column="1"/>
        <Label  Content="Excel sheet index № " 
            HorizontalAlignment="Center" 
            VerticalAlignment="Center" 
            FontFamily="Arial" 
            Foreground="Black" 
            Margin="24,36,89.2,16" 
            Width="134" Grid.ColumnSpan="2" Height="28" FontSize="13"
                />
        <TextBox 
            x:Name="textbox_shn1"
            Margin="39.8,24,18.2,34.8" FontFamily="ISOCPEUR" Grid.Row="1" Grid.Column="1"/>
        <TextBox 
            x:Name="textbox_shn2"
            Margin="39.8,59,18.2,79.8" FontFamily="ISOCPEUR" Grid.Row="1" Grid.RowSpan="2" Grid.Column="1"/>
        <TextBox 
            x:Name="textbox_shnm1"
            Margin="39.8,45.2,18.2,12.8" FontFamily="ISOCPEUR" Grid.Row="2" Grid.Column="1"/>
        <TextBox 
            x:Name="textbox_shnm2"
            Margin="39.8,77.2,18.2,60.8" FontFamily="ISOCPEUR" Grid.Row="2" Grid.RowSpan="2" Grid.Column="1"/>

    </Grid>

</Window>