diff --git a/src/MainDemo.Wpf/Fields.xaml b/src/MainDemo.Wpf/Fields.xaml
index 68481e35ea..0209417bdd 100644
--- a/src/MainDemo.Wpf/Fields.xaml
+++ b/src/MainDemo.Wpf/Fields.xaml
@@ -99,6 +99,7 @@
           <TextBox VerticalAlignment="Center"
                    materialDesign:TextFieldAssist.HasClearButton="True"
                    materialDesign:TextFieldAssist.PrefixText="$"
+                   materialDesign:TextFieldAssist.SelectAllOnTripleClick="True"
                    materialDesign:TextFieldAssist.SuffixText="mm"
                    Style="{StaticResource MaterialDesignFloatingHintTextBox}"
                    Text="Good stuff">
@@ -182,18 +183,18 @@
           <CheckBox x:Name="TextBoxWrapTextCheckBox"
                     Content="Wrap text"
                     IsChecked="True" />
-          
+
           <TextBox Grid.Row="1"
                    Height="80"
                    MinWidth="280"
                    VerticalAlignment="Stretch"
                    materialDesign:HintAssist.Hint="Multiline text"
                    AcceptsReturn="True"
+                   HorizontalScrollBarVisibility="Auto"
                    SpellCheck.IsEnabled="True"
                    Text="Multiline. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. The quick brown fox jumps over the lazy dog. War and peace. Keep going. Go on. For how long? Not long. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
                    TextWrapping="{Binding ElementName=TextBoxWrapTextCheckBox, Path=IsChecked, Converter={StaticResource BoolToTextWrappingConverter}}"
-                   VerticalScrollBarVisibility="Auto"
-                   HorizontalScrollBarVisibility="Auto"/>
+                   VerticalScrollBarVisibility="Auto" />
         </Grid>
       </smtx:XamlDisplay>
 
@@ -690,12 +691,11 @@
     <TextBlock Style="{StaticResource PageSectionTitleTextBlock}" Text="Custom Background" />
 
     <WrapPanel Margin="0,0,0,32" Background="Chocolate">
-      <smtx:XamlDisplay Margin="16"
-                        UniqueKey="fields_custom_background_1">
+      <smtx:XamlDisplay Margin="16" UniqueKey="fields_custom_background_1">
         <TextBox Width="200"
-                 Style="{StaticResource MaterialDesignOutlinedTextBox}"
                  materialDesign:HintAssist.Hint="Hint text"
-                 materialDesign:HintAssist.HintPaddingBrush="Chocolate" />
+                 materialDesign:HintAssist.HintPaddingBrush="Chocolate"
+                 Style="{StaticResource MaterialDesignOutlinedTextBox}" />
         <!-- Set HintAssist.HintPaddingBrush to match the custom background to get correct coloring of the hint padding (when floated) -->
       </smtx:XamlDisplay>
     </WrapPanel>
@@ -704,7 +704,7 @@
     <TextBlock Style="{StaticResource PageSectionTitleTextBlock}" Text="AutoSuggestBox" />
 
     <WrapPanel>
-      <StackPanel  Width="256" Margin="0,0,16,16">
+      <StackPanel Width="256" Margin="0,0,16,16">
         <TextBlock Margin="0,0,0,8"
                    VerticalAlignment="Center"
                    Style="{StaticResource MaterialDesignSubtitle1TextBlock}"
@@ -719,7 +719,7 @@
         </smtx:XamlDisplay>
       </StackPanel>
 
-      <StackPanel  Width="256" Margin="0,0,16,16">
+      <StackPanel Width="256" Margin="0,0,16,16">
         <TextBlock Margin="0,0,0,8"
                    Style="{StaticResource MaterialDesignSubtitle1TextBlock}"
                    Text="AutoSuggestBox with ItemTemplate" />
@@ -774,7 +774,7 @@
         </smtx:XamlDisplay>
       </StackPanel>
 
-      <StackPanel  Width="256" Margin="0,0,16,16">
+      <StackPanel Width="256" Margin="0,0,16,16">
         <TextBlock Margin="0,0,0,8"
                    Style="{StaticResource MaterialDesignSubtitle1TextBlock}"
                    Text="Outlined AutoSuggestBox" />
diff --git a/src/MaterialDesignThemes.Wpf/TextFieldAssist.cs b/src/MaterialDesignThemes.Wpf/TextFieldAssist.cs
index aac1a63024..42c0684b30 100644
--- a/src/MaterialDesignThemes.Wpf/TextFieldAssist.cs
+++ b/src/MaterialDesignThemes.Wpf/TextFieldAssist.cs
@@ -150,6 +150,45 @@ public static class TextFieldAssist
 
     public static bool GetIncludeSpellingSuggestions(TextBoxBase element) => (bool)element.GetValue(IncludeSpellingSuggestionsProperty);
 
+    /// <summary>
+    /// Allow triple click to select all text in a TextBox.
+    /// </summary>
+    public static readonly DependencyProperty SelectAllOnTripleClickProperty =
+        DependencyProperty.RegisterAttached(
+            "SelectAllOnTripleClick",
+            typeof(bool),
+            typeof(TextFieldAssist),
+            new PropertyMetadata(false, OnSelectAllOnTripleClickChanged));
+
+    public static bool GetSelectAllOnTripleClick(DependencyObject obj) =>
+        (bool)obj.GetValue(SelectAllOnTripleClickProperty);
+
+    public static void SetSelectAllOnTripleClick(DependencyObject obj, bool value) =>
+        obj.SetValue(SelectAllOnTripleClickProperty, value);
+
+    private static void OnSelectAllOnTripleClickChanged(
+        DependencyObject d,
+        DependencyPropertyChangedEventArgs e)
+    {
+        if (d is TextBox textBox)
+        {
+            if ((bool)e.NewValue)
+                textBox.PreviewMouseLeftButtonDown += TextBox_PreviewMouseLeftButtonDown;
+            else
+                textBox.PreviewMouseLeftButtonDown -= TextBox_PreviewMouseLeftButtonDown;
+        }
+    }
+
+    private static void TextBox_PreviewMouseLeftButtonDown(
+        object sender,
+        MouseButtonEventArgs e)
+    {
+        if (e.ClickCount == 3 && sender is TextBox textBox)
+        {
+            textBox.SelectAll();
+            e.Handled = true;
+        }
+    }
     /// <summary>
     /// SuffixText dependency property
     /// </summary>
diff --git a/tests/MaterialDesignThemes.UITests/WPF/TextBoxes/TextBoxTests.cs b/tests/MaterialDesignThemes.UITests/WPF/TextBoxes/TextBoxTests.cs
index 7a248ca4ef..c8dbb4ed9c 100644
--- a/tests/MaterialDesignThemes.UITests/WPF/TextBoxes/TextBoxTests.cs
+++ b/tests/MaterialDesignThemes.UITests/WPF/TextBoxes/TextBoxTests.cs
@@ -498,6 +498,27 @@ public async Task TextBox_MultiLineAndFixedHeight_RespectsVerticalContentAlignme
     }
 
     [Test]
+    public async Task TextBox_WithSelectAllOnTripleClick_SelectsAllText()
+    {
+        var textBox = await LoadXaml<TextBox>($$"""
+            <TextBox Style="{StaticResource MaterialDesignFilledTextBox}"
+              Text="Some text to select"
+              materialDesign:TextFieldAssist.SelectAllOnTripleClick="True"
+              Width="200" VerticalAlignment="Center" HorizontalAlignment="Center" />
+            """);
+        await textBox.LeftClick();
+        await textBox.LeftClick();
+        await textBox.LeftClick();
+        //await Task.Delay(1000); 
+        await Wait.For(async () =>
+        {
+            string? selectedText = await textBox.GetSelectedText();
+
+            await Assert.That(selectedText).IsEqualTo("Some text to select");
+        });
+    }
+
+        [Test]
     [Description("Issue 3176")]
     public async Task ValidationErrorTemplate_WithChangingErrors_UpdatesValidation()
     {