I have an image control inside a grid displaying a 16×16 icon. But for some reason even though I set the properties so it would remain 16×16 it looks stretched.

Code :
<UserControl x:Class="ChatControls.UserListItem"
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"
mc:Ignorable="d" d:DesignHeight="28" d:DesignWidth="132">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="24" MinWidth="24" MaxWidth="24" />
<ColumnDefinition Width="171*" />
</Grid.ColumnDefinitions>
<Image Name="imgIcon" Source="/ChatControls;component/Images/NormalUser.png" VerticalAlignment="Center" HorizontalAlignment="Center" Stretch="None" />
<Label Content="Muhammad[A]" Grid.Column="1" Name="lblNick" VerticalContentAlignment="Center" Padding="8,5,5,5" />
</Grid>
</UserControl>
Is there any reason for this?
UPDATE 1:
Yes at runtime also 🙁

Many thanks in advance.
I find I often have to explicitly specify the
WidthandHeightofImagecontrols to get them to appear correctly: