diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/CalculatorUpDown/Themes/Generic.xaml b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/CalculatorUpDown/Themes/Generic.xaml
index c5af6bee..e237823e 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/CalculatorUpDown/Themes/Generic.xaml
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/CalculatorUpDown/Themes/Generic.xaml
@@ -90,7 +90,7 @@
                                                         FontWeight="{TemplateBinding FontWeight}" 
                                                         Foreground="{TemplateBinding Foreground}" 
                                                         HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                                                        IsReadOnly="{Binding IsEditable, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource InverseBoolConverter}}"
+                                                        IsReadOnly="{Binding IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}"
                                                         MinWidth="20" AcceptsReturn="False" 
                                                         TextAlignment="{TemplateBinding TextAlignment}"
                                                         TextWrapping="NoWrap" 
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/InputBase.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/InputBase.cs
index 7ef4b1ac..e5b56ce6 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/InputBase.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/InputBase.cs
@@ -20,16 +20,16 @@ namespace Microsoft.Windows.Controls.Primitives
 
         #endregion //CultureInfo
 
-        #region IsEditable
+        #region IsReadOnly
 
-        public static readonly DependencyProperty IsEditableProperty = DependencyProperty.Register("IsEditable", typeof(bool), typeof(InputBase), new PropertyMetadata(true));
-        public bool IsEditable
+        public static readonly DependencyProperty IsReadOnlyProperty = DependencyProperty.Register("IsReadOnly", typeof(bool), typeof(InputBase), new UIPropertyMetadata(false));
+        public bool IsReadOnly
         {
-            get { return (bool)GetValue(IsEditableProperty); }
-            set { SetValue(IsEditableProperty, value); }
+            get { return (bool)GetValue(IsReadOnlyProperty); }
+            set { SetValue(IsReadOnlyProperty, value); }
         }
 
-        #endregion //IsEditable
+        #endregion //IsReadOnly        
 
         #region Text
 
@@ -62,7 +62,7 @@ namespace Microsoft.Windows.Controls.Primitives
             get { return (TextAlignment)GetValue(TextAlignmentProperty); }
             set { SetValue(TextAlignmentProperty, value); }
         }
-        
+
 
         #endregion //TextAlignment
 
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/UpDownBase.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/UpDownBase.cs
index 5a8282da..56d02e4a 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/UpDownBase.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/UpDownBase.cs
@@ -138,21 +138,21 @@ namespace Microsoft.Windows.Controls.Primitives
             {
                 case Key.Up:
                     {
-                        if (AllowSpin)
+                        if (AllowSpin && !IsReadOnly)
                             DoIncrement();
                         e.Handled = true;
                         break;
                     }
                 case Key.Down:
                     {
-                        if (AllowSpin)
+                        if (AllowSpin && !IsReadOnly)
                             DoDecrement();
                         e.Handled = true;
                         break;
                     }
                 case Key.Enter:
                     {
-                        if (IsEditable)
+                        if (!IsReadOnly)
                         {
                             var binding = BindingOperations.GetBindingExpression(TextBox, System.Windows.Controls.TextBox.TextProperty);
                             binding.UpdateSource();
@@ -166,7 +166,7 @@ namespace Microsoft.Windows.Controls.Primitives
         {
             base.OnMouseWheel(e);
 
-            if (!e.Handled && AllowSpin && ((TextBox.IsFocused && MouseWheelActiveOnFocus) || !MouseWheelActiveOnFocus))
+            if (!e.Handled && AllowSpin && !IsReadOnly && ((TextBox.IsFocused && MouseWheelActiveOnFocus) || !MouseWheelActiveOnFocus))
             {
                 if (e.Delta < 0)
                 {
@@ -192,7 +192,7 @@ namespace Microsoft.Windows.Controls.Primitives
 
         private void OnSpinnerSpin(object sender, SpinEventArgs e)
         {
-            if (AllowSpin)
+            if (AllowSpin && !IsReadOnly)
                 OnSpin(e);
         }
 
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimePicker/Themes/Generic.xaml b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimePicker/Themes/Generic.xaml
index d5d394a6..1a0d9554 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimePicker/Themes/Generic.xaml
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimePicker/Themes/Generic.xaml
@@ -91,7 +91,7 @@
                                                 FontWeight="{TemplateBinding FontWeight}" 
                                                 Foreground="{TemplateBinding Foreground}" 
                                                 HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                                                IsReadOnly="{Binding IsEditable, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource InverseBoolConverter}}"
+                                                IsReadOnly="{Binding IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}"
                                                 MinWidth="20" AcceptsReturn="False" 
                                                 TextAlignment="{TemplateBinding TextAlignment}"
                                                 TextWrapping="NoWrap" 
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Implementation/DateTimeUpDown.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Implementation/DateTimeUpDown.cs
index 461a2779..1870cdcd 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Implementation/DateTimeUpDown.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Implementation/DateTimeUpDown.cs
@@ -155,7 +155,7 @@ namespace Microsoft.Windows.Controls
             {
                 case Key.Enter:
                     {
-                        if (IsEditable)
+                        if (!IsReadOnly)
                         {
                             _fireSelectionChangedEvent = false;
                             BindingExpression binding = BindingOperations.GetBindingExpression(TextBox, System.Windows.Controls.TextBox.TextProperty);
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Themes/Generic.xaml b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Themes/Generic.xaml
index 917ab3f6..9869dcef 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Themes/Generic.xaml
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Themes/Generic.xaml
@@ -1,9 +1,6 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:local="clr-namespace:Microsoft.Windows.Controls"
-                    xmlns:coreConverters="clr-namespace:Microsoft.Windows.Controls.Core.Converters">
-
-    <coreConverters:InverseBoolConverter x:Key="InverseBoolConverter" />
+                    xmlns:local="clr-namespace:Microsoft.Windows.Controls">
 
     <DataTemplate x:Key="DefaultWatermarkTemplate">
         <ContentControl Content="{Binding}" Foreground="Gray" Focusable="False" />
@@ -36,7 +33,7 @@
                                                 FontWeight="{TemplateBinding FontWeight}" 
                                                 Foreground="{TemplateBinding Foreground}" 
                                                 HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                                                IsReadOnly="{Binding IsEditable, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource InverseBoolConverter}}"
+                                                IsReadOnly="{Binding IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}"
                                                 MinWidth="20" AcceptsReturn="False" 
                                                 TextAlignment="{TemplateBinding TextAlignment}"
                                                 TextWrapping="NoWrap" 
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Themes/Generic.xaml b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Themes/Generic.xaml
index a7ad2765..476a6b42 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Themes/Generic.xaml
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Themes/Generic.xaml
@@ -32,7 +32,7 @@
                                                 FontWeight="{TemplateBinding FontWeight}" 
                                                 Foreground="{TemplateBinding Foreground}" 
                                                 HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                                                IsReadOnly="{Binding IsEditable, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource InverseBoolConverter}}"
+                                                IsReadOnly="{Binding IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}"
                                                 MinWidth="20" AcceptsReturn="False" 
                                                 SelectAllOnGotFocus="{Binding SelectAllOnGotFocus, RelativeSource={RelativeSource TemplatedParent}}"
                                                 TextAlignment="{Binding TextAlignment, RelativeSource={RelativeSource TemplatedParent}}"