How to customize textbox and combo box border WPF - wpf

Question

Before I post my code let me post image where you can easily notice what's acctually happening:
And as you can see on text boxes, border thickness is not same on every side.
In case of textbox it is much more brighter on the right for example.
Also on combobox there is something like shadow on top and on left side..
How could I fix this, I simply want 1px blue border around my controls..
And here is my code:
<ComboBox Name="cmbComboBoxOne" Height="40" BorderThickness="1" VerticalAlignment="Center" BorderBrush="#0091EA" ></ComboBox>
<TextBox Name="txtTextBoxOne" TextWrapping="Wrap" Text="TextBox" BorderThickness="1" BorderBrush="#0091EA" />
EDIT:
I applied Edit Template Copy, I set border thickness to 1 and colour to purple, and it looks like this:
So guys, again it is not good with thickness:1 px, for example with thickness:2px its awesome, all sides are equal but 2px is too much for me..
Here is my code after I edited template:
<TextBox x:Name="txtName" Grid.Column="1" SnapsToDevicePixels="True" UseLayoutRounding="True" Grid.Row="0" Margin="5,0,10,0" TextWrapping="Wrap" Text="TextBox" Height="40" VerticalAlignment="Center" Style="{DynamicResource TextBoxStyle1}" >
<TextBox.Resources>
<Style x:Key="TextBoxStyle1" TargetType="{x:Type TextBox}">
<Setter Property="BorderBrush" Value="Purple"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/>
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
<Setter Property="Padding" Value="1"/>
<Setter Property="KeyboardNavigation.TabNavigation" Value="None"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="AllowDrop" Value="true"/>
<Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TextBox}">
<Microsoft_Windows_Themes:ClassicBorderDecorator x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" BorderStyle="Sunken" Background="{TemplateBinding Background}">
<ScrollViewer x:Name="PART_ContentHost"/>
</Microsoft_Windows_Themes:ClassicBorderDecorator>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</TextBox.Resources>
</TextBox>
as you can see guys
<Setter Property="BorderBrush" Value="Purple"/>
<Setter Property="BorderThickness" Value="1"/>
are set, but result is somehow same :/

Answer 1

Try to set the SnapsToDevicePixels and/or UseLayoutRounding properties to True:
<ComboBox Name="cmbComboBoxOne" ... SnapsToDevicePixels="True" UseLayoutRounding="True" />
If this doesn't work you could try to modify the control template of the controls. Right-click on them in design mode in Visual Studio 2012+ or Blend and choose Edit Template->Edit a Copy to copy the default templates into your XAML markup and then set the above properties on the Border elements in the generated templates.
Edit: Replace the ClassicBorderDecorator with an ordinary Border element:
<TextBox x:Name="txtName" Grid.Column="1" SnapsToDevicePixels="True" UseLayoutRounding="True" Grid.Row="0" Margin="5,0,10,0" TextWrapping="Wrap" Text="TextBox" Height="40" VerticalAlignment="Center" Style="{DynamicResource TextBoxStyle1}" >
<TextBox.Resources>
<Style x:Key="TextBoxStyle1" TargetType="{x:Type TextBox}">
<Setter Property="BorderBrush" Value="Purple"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/>
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
<Setter Property="Padding" Value="1"/>
<Setter Property="KeyboardNavigation.TabNavigation" Value="None"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="AllowDrop" Value="true"/>
<Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TextBox}">
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
<ScrollViewer x:Name="PART_ContentHost"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</TextBox.Resources>
</TextBox>

Answer 2

If you want to customize textbox and combobox border you need to change default style and template of these controls by right click on control and select edit template.