diff --git a/Microsoft.Toolkit.Uwp.Notifications/Common/EnumFormatter.cs b/Microsoft.Toolkit.Uwp.Notifications/Common/EnumFormatter.cs
index 197b0c8ef46..d7271537450 100644
--- a/Microsoft.Toolkit.Uwp.Notifications/Common/EnumFormatter.cs
+++ b/Microsoft.Toolkit.Uwp.Notifications/Common/EnumFormatter.cs
@@ -6,51 +6,52 @@
 
 #nullable enable
 
-namespace Microsoft.Toolkit.Uwp.Notifications;
-
-/// <summary>
-/// A helper class that can be used to format <see cref="Enum"/> values.
-/// </summary>
-internal static class EnumFormatter
+namespace Microsoft.Toolkit.Uwp.Notifications
 {
     /// <summary>
-    /// Returns a <see cref="string"/> representation of an enum value with pascal casing.
+    /// A helper class that can be used to format <see cref="Enum"/> values.
     /// </summary>
-    /// <typeparam name="T">The <see cref="Enum"/> type to format.</typeparam>
-    /// <param name="value">The <typeparamref name="T"/> value to format.</param>
-    /// <returns>The pascal case <see cref="string"/> representation of <paramref name="value"/>.</returns>
-    public static string? ToPascalCaseString<T>(this T? value)
-        where T : unmanaged, Enum
+    internal static class EnumFormatter
     {
-        if (value is null)
+        /// <summary>
+        /// Returns a <see cref="string"/> representation of an enum value with pascal casing.
+        /// </summary>
+        /// <typeparam name="T">The <see cref="Enum"/> type to format.</typeparam>
+        /// <param name="value">The <typeparamref name="T"/> value to format.</param>
+        /// <returns>The pascal case <see cref="string"/> representation of <paramref name="value"/>.</returns>
+        public static string? ToPascalCaseString<T>(this T? value)
+            where T : unmanaged, Enum
         {
-            return null;
+            if (value is null)
+            {
+                return null;
+            }
+
+            return ToPascalCaseString(value.Value);
         }
 
-        return ToPascalCaseString(value.Value);
-    }
+        /// <summary>
+        /// Returns a <see cref="string"/> representation of an enum value with pascal casing.
+        /// </summary>
+        /// <typeparam name="T">The <see cref="Enum"/> type to format.</typeparam>
+        /// <param name="value">The <typeparamref name="T"/> value to format.</param>
+        /// <returns>The pascal case <see cref="string"/> representation of <paramref name="value"/>.</returns>
+        public static string? ToPascalCaseString<T>(this T value)
+            where T : unmanaged, Enum
+        {
+            string? text = value.ToString();
 
-    /// <summary>
-    /// Returns a <see cref="string"/> representation of an enum value with pascal casing.
-    /// </summary>
-    /// <typeparam name="T">The <see cref="Enum"/> type to format.</typeparam>
-    /// <param name="value">The <typeparamref name="T"/> value to format.</param>
-    /// <returns>The pascal case <see cref="string"/> representation of <paramref name="value"/>.</returns>
-    public static string? ToPascalCaseString<T>(this T value)
-        where T : unmanaged, Enum
-    {
-        string? text = value.ToString();
+            if (text is null or { Length: 0 })
+            {
+                return text;
+            }
 
-        if (text is null or { Length: 0 })
-        {
-            return text;
-        }
+            if (text is { Length: 1 })
+            {
+                return text.ToLowerInvariant();
+            }
 
-        if (text is { Length: 1 })
-        {
-            return text.ToLowerInvariant();
+            return $"{char.ToLowerInvariant(text[0])}{text.Substring(1)}";
         }
-
-        return $"{char.ToLowerInvariant(text[0])}{text.Substring(1)}";
     }
 }
\ No newline at end of file
diff --git a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlAdditionalProperties.cs b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlAdditionalProperties.cs
index 6c5d85d3b38..cb11d04ca57 100644
--- a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlAdditionalProperties.cs
+++ b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlAdditionalProperties.cs
@@ -6,15 +6,16 @@
 
 #nullable enable
 
-namespace Microsoft.Toolkit.Uwp.Notifications;
-
-/// <summary>
-/// An interface for a notification XML element with additional properties.
-/// </summary>
-internal interface IHaveXmlAdditionalProperties
+namespace Microsoft.Toolkit.Uwp.Notifications
 {
     /// <summary>
-    /// Gets the mapping of additional properties.
+    /// An interface for a notification XML element with additional properties.
     /// </summary>
-    IReadOnlyDictionary<string, string> AdditionalProperties { get; }
-}
\ No newline at end of file
+    internal interface IHaveXmlAdditionalProperties
+    {
+        /// <summary>
+        /// Gets the mapping of additional properties.
+        /// </summary>
+        IReadOnlyDictionary<string, string> AdditionalProperties { get; }
+    }
+}
diff --git a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlChildren.cs b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlChildren.cs
index 9bc07e8a099..e97000d3b81 100644
--- a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlChildren.cs
+++ b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlChildren.cs
@@ -6,15 +6,16 @@
 
 #nullable enable
 
-namespace Microsoft.Toolkit.Uwp.Notifications;
-
-/// <summary>
-/// An interface for a notification XML element with additional children.
-/// </summary>
-internal interface IHaveXmlChildren
+namespace Microsoft.Toolkit.Uwp.Notifications
 {
     /// <summary>
-    /// Gets the children of the current element.
+    /// An interface for a notification XML element with additional children.
     /// </summary>
-    IEnumerable<object> Children { get; }
+    internal interface IHaveXmlChildren
+    {
+        /// <summary>
+        /// Gets the children of the current element.
+        /// </summary>
+        IEnumerable<object> Children { get; }
+    }
 }
\ No newline at end of file
diff --git a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlContent.cs b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlContent.cs
deleted file mode 100644
index 1ffab08022c..00000000000
--- a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlContent.cs
+++ /dev/null
@@ -1,16 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-namespace Microsoft.Toolkit.Uwp.Notifications;
-
-/// <summary>
-/// An interface for a notification XML element with an explicit XML text content.
-/// </summary>
-internal interface IHaveXmlText
-{
-    /// <summary>
-    /// Gets the text content of the current element.
-    /// </summary>
-    string Text { get; }
-}
diff --git a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlName.cs b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlName.cs
index fc6b25e8490..82c8308e78d 100644
--- a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlName.cs
+++ b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlName.cs
@@ -2,15 +2,16 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-namespace Microsoft.Toolkit.Uwp.Notifications;
-
-/// <summary>
-/// An interface for a notification XML element with a name.
-/// </summary>
-internal interface IHaveXmlName
+namespace Microsoft.Toolkit.Uwp.Notifications
 {
     /// <summary>
-    /// Gets the name of the current element.
+    /// An interface for a notification XML element with a name.
     /// </summary>
-    string Name { get; }
+    internal interface IHaveXmlName
+    {
+        /// <summary>
+        /// Gets the name of the current element.
+        /// </summary>
+        string Name { get; }
+    }
 }
diff --git a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlNamedProperties.cs b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlNamedProperties.cs
index 9322746075d..5dcc7549f4f 100644
--- a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlNamedProperties.cs
+++ b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlNamedProperties.cs
@@ -6,17 +6,18 @@
 
 #nullable enable
 
-namespace Microsoft.Toolkit.Uwp.Notifications;
-
-/// <summary>
-/// An interface for a notification XML element with named properties.
-/// </summary>
-internal interface IHaveXmlNamedProperties
+namespace Microsoft.Toolkit.Uwp.Notifications
 {
     /// <summary>
-    /// Enumerates the available named properties for the element.
+    /// An interface for a notification XML element with named properties.
     /// </summary>
-    /// <returns>A sequence of named properties for the element.</returns>
-    /// <remarks>The returned values must be valid XML values when <see cref="object.ToString"/> is called on them.</remarks>
-    IEnumerable<KeyValuePair<string, object?>> EnumerateNamedProperties();
+    internal interface IHaveXmlNamedProperties
+    {
+        /// <summary>
+        /// Enumerates the available named properties for the element.
+        /// </summary>
+        /// <returns>A sequence of named properties for the element.</returns>
+        /// <remarks>The returned values must be valid XML values when <see cref="object.ToString"/> is called on them.</remarks>
+        IEnumerable<KeyValuePair<string, object?>> EnumerateNamedProperties();
+    }
 }
diff --git a/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlText.cs b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlText.cs
new file mode 100644
index 00000000000..de7352073f2
--- /dev/null
+++ b/Microsoft.Toolkit.Uwp.Notifications/Common/Serialization/IHaveXmlText.cs
@@ -0,0 +1,17 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.Toolkit.Uwp.Notifications
+{
+    /// <summary>
+    /// An interface for a notification XML element with an explicit XML text content.
+    /// </summary>
+    internal interface IHaveXmlText
+    {
+        /// <summary>
+        /// Gets the text content of the current element.
+        /// </summary>
+        string Text { get; }
+    }
+}