diff --git a/src/MainDemo.Wpf/Fields.xaml b/src/MainDemo.Wpf/Fields.xaml
index 68481e35ea..be5fe9088a 100644
--- a/src/MainDemo.Wpf/Fields.xaml
+++ b/src/MainDemo.Wpf/Fields.xaml
@@ -148,7 +148,14 @@
                    Style="{StaticResource MaterialDesignFloatingHintTextBox}"
                    Text="Some Text" />
         </smtx:XamlDisplay>
+      </DockPanel>
 
+      <DockPanel Style="{StaticResource FieldDockPanel}">
+        <smtx:XamlDisplay UniqueKey="fields_2">
+          <TextBox materialDesign:TextFieldAssist.SelectAllOnTripleClick="False"
+                   Style="{StaticResource MaterialDesignTextBox}"
+                   Text="Triple click does not select all text" />
+        </smtx:XamlDisplay>
       </DockPanel>
 
       <DockPanel Style="{StaticResource FieldDockPanel}">
@@ -182,18 +189,18 @@
           <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 +697,11 @@
     <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 +710,7 @@
     <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 +725,7 @@
         </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 +780,7 @@
         </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/MaterialDesign3.Demo.Wpf/Fields.xaml b/src/MaterialDesign3.Demo.Wpf/Fields.xaml
index 6bcfd37bc6..fdf7a2c3bd 100644
--- a/src/MaterialDesign3.Demo.Wpf/Fields.xaml
+++ b/src/MaterialDesign3.Demo.Wpf/Fields.xaml
@@ -43,7 +43,7 @@
         <ColumnDefinition Width="Auto" />
         <ColumnDefinition Width="155" />
         <ColumnDefinition Width="Auto" />
-        <ColumnDefinition Width="155" />
+        <ColumnDefinition Width="190" />
         <ColumnDefinition Width="*" />
       </Grid.ColumnDefinitions>
 
@@ -54,6 +54,7 @@
         <RowDefinition Height="Auto" />
         <RowDefinition Height="Auto" />
         <RowDefinition Height="Auto" />
+        <RowDefinition Height="Auto" />
       </Grid.RowDefinitions>
 
       <TextBlock Grid.Row="0"
@@ -164,6 +165,14 @@
       </smtx:XamlDisplay>
 
       <smtx:XamlDisplay Grid.Row="4"
+                        Grid.Column="3"
+                        UniqueKey="fields_2">
+          <TextBox materialDesign:TextFieldAssist.SelectAllOnTripleClick="False"
+                   Style="{StaticResource MaterialDesignTextBox}"
+                   Text="Triple click does not select all text" />
+        </smtx:XamlDisplay>
+
+      <smtx:XamlDisplay Grid.Row="5"
                         Grid.Column="3"
                         UniqueKey="fields_13">
         <TextBox MinWidth="72"
@@ -171,7 +180,7 @@
                  IsEnabled="False" />
       </smtx:XamlDisplay>
 
-      <smtx:XamlDisplay Grid.Row="5"
+      <smtx:XamlDisplay Grid.Row="6"
                         Grid.Column="3"
                         UniqueKey="fields_15">
         <PasswordBox MinWidth="72"
diff --git a/src/MaterialDesignThemes.Wpf/TextFieldAssist.cs b/src/MaterialDesignThemes.Wpf/TextFieldAssist.cs
index aac1a63024..2a26e8529d 100644
--- a/src/MaterialDesignThemes.Wpf/TextFieldAssist.cs
+++ b/src/MaterialDesignThemes.Wpf/TextFieldAssist.cs
@@ -150,6 +150,46 @@ 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(TextBoxBase obj) =>
+        (bool)obj.GetValue(SelectAllOnTripleClickProperty);
+
+    public static void SetSelectAllOnTripleClick(TextBoxBase obj, bool value) =>
+        obj.SetValue(SelectAllOnTripleClickProperty, value);
+
+    private static void OnSelectAllOnTripleClickChanged(
+        DependencyObject d,
+        DependencyPropertyChangedEventArgs e)
+    {
+        if (d is TextBoxBase textBox)
+        {
+            if ((bool)e.NewValue)
+                textBox.PreviewMouseLeftButtonDown += TextBox_PreviewMouseLeftButtonDown;
+            else
+                textBox.PreviewMouseLeftButtonDown -= TextBox_PreviewMouseLeftButtonDown;
+        }
+
+        static void TextBox_PreviewMouseLeftButtonDown(
+            object sender,
+            MouseButtonEventArgs e)
+        {
+            if (e.ClickCount == 3 && sender is TextBoxBase textBox)
+            {
+                textBox.SelectAll();
+                e.Handled = true;
+            }
+        }
+    }
+
     /// <summary>
     /// SuffixText dependency property
     /// </summary>
diff --git a/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.TextBox.xaml b/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.TextBox.xaml
index e80e3ef2e7..670cb90621 100644
--- a/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.TextBox.xaml
+++ b/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.TextBox.xaml
@@ -629,6 +629,7 @@
     <Setter Property="wpf:TextFieldAssist.CharacterCounterStyle" Value="{StaticResource MaterialDesignCharacterCounterTextBlock}" />
     <Setter Property="wpf:TextFieldAssist.CharacterCounterVisibility" Value="Visible" />
     <Setter Property="wpf:TextFieldAssist.IncludeSpellingSuggestions" Value="{Binding RelativeSource={RelativeSource Self}, Path=(SpellCheck.IsEnabled)}" />
+    <Setter Property="wpf:TextFieldAssist.SelectAllOnTripleClick" Value="True" />
     <Setter Property="wpf:TextFieldAssist.TextBoxViewMargin" Value="{x:Static wpf:Constants.DefaultTextBoxViewMargin}" />
     <Setter Property="wpf:TextFieldAssist.TextBoxViewVerticalAlignment" Value="Stretch" />
     <Setter Property="wpf:TextFieldAssist.UnderlineBrush" Value="{DynamicResource MaterialDesign.Brush.Primary}" />
diff --git a/tests/MaterialDesignThemes.UITests/WPF/TextBoxes/TextBoxTests.cs b/tests/MaterialDesignThemes.UITests/WPF/TextBoxes/TextBoxTests.cs
index 7a248ca4ef..3c004f7759 100644
--- a/tests/MaterialDesignThemes.UITests/WPF/TextBoxes/TextBoxTests.cs
+++ b/tests/MaterialDesignThemes.UITests/WPF/TextBoxes/TextBoxTests.cs
@@ -497,6 +497,49 @@ public async Task TextBox_MultiLineAndFixedHeight_RespectsVerticalContentAlignme
         await Assert.That(await contentGrid.GetVerticalAlignment()).IsEqualTo(expectedFloatingHintAlignment);
     }
 
+    [Test]
+    public async Task TextBox_WithSelectAllOnTripleClick_False_DoesNotSelectAllText()
+    {
+        var textBox = await LoadXaml<TextBox>($$"""
+            <TextBox Style="{StaticResource MaterialDesignFilledTextBox}"
+              Text="Some text to select"
+              materialDesign:TextFieldAssist.SelectAllOnTripleClick="False"
+              Width="200" VerticalAlignment="Center" HorizontalAlignment="Center" />
+            """);
+
+        await textBox.LeftClick(Position.LeftCenter, xOffset: 30);
+        await textBox.LeftClick(Position.LeftCenter, xOffset: 30);
+        await textBox.LeftClick(Position.LeftCenter, xOffset: 30);
+
+        await Wait.For(async () =>
+        {
+            string? selectedText = await textBox.GetSelectedText();
+
+            await Assert.That(selectedText).IsEqualTo("Some ");
+        });
+    }
+
+    [Test]
+    public async Task TextBox_WithDefaultSelectAllOnTripleClick_SelectsAllText()
+    {
+        var textBox = await LoadXaml<TextBox>($$"""
+            <TextBox Style="{StaticResource MaterialDesignFilledTextBox}"
+              Text="Some text to select"
+              Width="200" VerticalAlignment="Center" HorizontalAlignment="Center" />
+            """);
+
+        await textBox.LeftClick(Position.LeftCenter, xOffset: 30);
+        await textBox.LeftClick(Position.LeftCenter, xOffset: 30);
+        await textBox.LeftClick(Position.LeftCenter, xOffset: 30);
+
+        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()